This is just a theory ive thought about and going by the manga it should work. Im pretty sure alot of people probably read the title and thought im trolling. Allow me show you what i mean. 
Im sure we all know how edo tensei works. If you dont read this;
.
If you cannot be bothered to read narutopedia ill explain it by manga links.
Basically it brings the dead back to their true forms;
Further explained by the anbu ninjas;
Further explained by kabuto;
So now we basically know more or less everything about edo tensei. Firstly how does it clone unique weapons?. If it revives the dead back to their self before they died they would have their abilities as seen with all the edo ninja's with kekeganki's.
Now what about ninja weapons?. If the ninja died with when he had his weapons with him, edo tensei also brings this back, as seen with the 7 swords men of the mist;
This is where the cloning begins. As we know suigetsu has the original Executioner's Blade (zabuza's sword). After the sealing of the zabuza, kakashi now has the cloned sword;
I thought the sword would also disappear, shortly after the sealing of zabuza, but in this later link kakashi still yields it;
Okay so it seems there are two executioners swords in existence. Why kakashi isnt wielding it anymore in the latest chapter is up for debate. Maybe it doesnt suit his fighting style or maybe the sword eventually disappeared due to its true wielder being sealed (zabuza). If the latter is the case that means that if zabuza wasnt sealed there really would be two swords in existence.
Enough with the cloning of weapons. Im now going to talk about the possibility of cloning tailed beast, no im not mad
.
As we know with edo tensei it revives the dead back to how they were before they died. If youve noticed all jinchurikcis have had their beast removed before death. Examples being the jinchuricki's akatsuki had. Also kushiha and mito.
Therefore none of them died with the tailed beast. Meaning if the jinchuricki were revived they wouldnt have the tailed beast or its power in them because thats not how they died.
Now what if a jinchuricki died with its tailed beast intact. For example died in battle. Going by how edo tensei works, if they were revived they would be jinchurickis again.
This is where the cloning begins. From what we know if a jinchuricki dies with its beast inside, the tailed beast also died, BUT it gets revived again as kushina said;
The sage also fearing that if he died the 10 tailed would terrorise the world again, split it into 9 and buried its body on the moon. The sage knew that if the 10 tailed was revived after his death nobody would be able to accomplished what he did so he split them. He was right, minato only managed to seal half of the fox in himself with the death god tech. The 3rd raikage was only able to draw with the 8 tailed. In both instances neither really got the better of the tailed beast and this was just a portion of the 10 tailed
It might not be clear so this is a link;
Now this is what im talking about. If the tailed beasts comes back to life after the jinchuricki has died and somebody used edo tensei to bring back this jinchurcki going by how edo tensei works, the jinchurcki would also have the tailed beasts power in them and if they were as good as bee might be able to transform into the tailed beast.
Now the question is, could you then try to extract the tailed beast in the edo jinchurcki revived, if so you could have 2 identical tailed beasts, similar to zabuza's sword.
Im sure we all know how edo tensei works. If you dont read this;
You must be registered for see links
If you cannot be bothered to read narutopedia ill explain it by manga links.
Basically it brings the dead back to their true forms;
You must be registered for see images
Further explained by the anbu ninjas;
You must be registered for see images
Further explained by kabuto;
You must be registered for see images
You must be registered for see images
So now we basically know more or less everything about edo tensei. Firstly how does it clone unique weapons?. If it revives the dead back to their self before they died they would have their abilities as seen with all the edo ninja's with kekeganki's.
You must be registered for see images
Now what about ninja weapons?. If the ninja died with when he had his weapons with him, edo tensei also brings this back, as seen with the 7 swords men of the mist;
You must be registered for see images
This is where the cloning begins. As we know suigetsu has the original Executioner's Blade (zabuza's sword). After the sealing of the zabuza, kakashi now has the cloned sword;
You must be registered for see images
I thought the sword would also disappear, shortly after the sealing of zabuza, but in this later link kakashi still yields it;
You must be registered for see images
Okay so it seems there are two executioners swords in existence. Why kakashi isnt wielding it anymore in the latest chapter is up for debate. Maybe it doesnt suit his fighting style or maybe the sword eventually disappeared due to its true wielder being sealed (zabuza). If the latter is the case that means that if zabuza wasnt sealed there really would be two swords in existence.
Enough with the cloning of weapons. Im now going to talk about the possibility of cloning tailed beast, no im not mad
As we know with edo tensei it revives the dead back to how they were before they died. If youve noticed all jinchurikcis have had their beast removed before death. Examples being the jinchuricki's akatsuki had. Also kushiha and mito.
Therefore none of them died with the tailed beast. Meaning if the jinchuricki were revived they wouldnt have the tailed beast or its power in them because thats not how they died.
Now what if a jinchuricki died with its tailed beast intact. For example died in battle. Going by how edo tensei works, if they were revived they would be jinchurickis again.
This is where the cloning begins. From what we know if a jinchuricki dies with its beast inside, the tailed beast also died, BUT it gets revived again as kushina said;
You must be registered for see images
The sage also fearing that if he died the 10 tailed would terrorise the world again, split it into 9 and buried its body on the moon. The sage knew that if the 10 tailed was revived after his death nobody would be able to accomplished what he did so he split them. He was right, minato only managed to seal half of the fox in himself with the death god tech. The 3rd raikage was only able to draw with the 8 tailed. In both instances neither really got the better of the tailed beast and this was just a portion of the 10 tailed
You must be registered for see images
It might not be clear so this is a link;
You must be registered for see links
Now this is what im talking about. If the tailed beasts comes back to life after the jinchuricki has died and somebody used edo tensei to bring back this jinchurcki going by how edo tensei works, the jinchurcki would also have the tailed beasts power in them and if they were as good as bee might be able to transform into the tailed beast.
Now the question is, could you then try to extract the tailed beast in the edo jinchurcki revived, if so you could have 2 identical tailed beasts, similar to zabuza's sword.