you have no idea what your talking about...
first off, kisame killed the former wielder of samehada TO TAKE HIS SWORD....that means he was killed while he had the sword and kisame took it...
second, you must be slow if you think that its just a coincidence that the only 3 swords that were not summoned were swords that living people currently have...
We have NEVER seen 2 of any of the swordsmans weapons...WHY????? Because there is only 1 set of swords...
If the swordsman come back with their swords from edo tensei, then WHY DID THE SWORDS HAVE TO BE SUMMONED?????
FYI edo tensei doesnt bring you back with the abilities you had EXACTLY at death, because if that were true, ITACHI WAS BLIND WHEN HE DIED AND HIS MS WAS GONE......explain that
With that in mind, Zabuza would have came back with his sword since he died in battle using it....but he didnt, because NONE of the swordsman were brought back with their weapons.
U_U
For someone that obviously idolized Shikamaru your logic is more like Naruto's. I'll try to explain again. I'll also fix something that's wrong in my previous post.
Check out this link to find out more about the swords of The Seven Ninja Swordsmen of the Mist
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The 3 swords that missing from the scroll were:
1. Kubikiribōchō (首斬り包丁; Viz "Executioner's Blade"; Literally meaning "Decapitating Carving Knife"). It is also called a "Seversword" (断刀, Dantō).
2. Samehada (鮫肌; Literally meaning "Shark Skin"). It is also called a "Greatsword" (大刀, Daitō).
3. Hiramekarei (ヒラメカレイ). It is also called a "Twinswords" (双刀, Sōtō).
Take a look here
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Last time I check the manga is read from right to left, top to bottom and the pages started from 1 and counting up. And no it's not flashback either just in case if you are still not getting it. That page painted the 1st meeting of Kakashi's division with The Seven Ninja Swordsmen of the Mist. The swords summoning happened in page 6. So let's play by your logic, are you suggesting that Zabusa (not having his sword after the summoned) went to the Kage's Summit and retrieve his sword? Or better yet are you suggesting that Madara or Zetsu or even Sasuke maybe playing servant to fetch the sword for Zabusa? In case you thought that's possible, I'll give you something to think about, Madara met Kabuto after the Kage's Summit.
In case you still not convince that Zabusa has his sword take a look here
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and in case you still don't get how to read manga, that page pictured what happened after the 1st meeting (page 2 of chapter 523) and after the swords summoning (page 6 of chapter 523).
Find and re-read the story of Kin-Gin brothers, the cloud managed to take the amber pot away from the brothers' possession and guest what? It's the only weapon missing when they're summoned. Again are you suggesting that the brothers roaming all over the world to search their weapons if they didn't have their weapons when they're summoned? How about Hanzo chained sickle? Did he happen to find one lying around all over the place for him to take?
SEVERSWORD DID NOT HAVE TO BE SUMMONED. Following are the answers to why Mangetsu possessed and summoned 4 of the swords. Mangetsu Hōzuki was the only person that could use all 7 swords and therefore he at one time has all 7 of them with him. I would speculate that he defeated (or killed) all the other 6 swordmen and took possession of all the swords. If you have 7 swords with you how will you carry them, the logical one in Naruto's world would be using scroll. However, somehow Zabuza Momochi, Fuguki Suikazan and Chōjūrō got the swords from Mangetsu before his death, that's why those 3 swords were missing from his scroll. Mangetsu was believed to be the former wielder of Hiramekarei ("Twinswords") which is now in Chōjūrō's hand. It's unknown whether Chōjūrō was Mangetsu's disciple or the disciple of the former wielder before Mangetsu.
Samehada is a very special sword, maybe it's the only weapon in Naruto's world that acted like it's alive. For me in the case of Samehada you could lose it if it switch its allegiance. Maybe Fuguki Suikazan has lost Samehada's allegiance before his death. Now what happened to Hiramekarei, as of now we don't know anything because Kishi has not told it. Anyway the facts remain that ALL THE SUMMONED ONES HAVE ALL THEIR WEAPONS WITH THEM UNLESS THEY LOST IT BEFORE THEIR DEATH.
Now let's talk about Itachi and Sharingan. Are you sure that Itachi was blind and lost his MS after his fight with Sasuke? I would say that your knowledge about Sharingan wasn't up to scratch. Please find and then re-read the chapters that told the story of Danzo's fight with Sasuke, and about Kakashi's Kamui. Chakra is needed for using Sharingan in another words, your Sharingan effectiveness depends on the eyes and the amount of chakra you have. Even armed with Hashirama's power, Danzo couldn't use Shisui's eye all the time, it's the limit of the eye. Kakashi can only use Kamui twice at a time, it's the limit of his chaka.
If Itachi's eyes has lost it lights, then why Madara wasted his time to implant them to Sasuke's? Why Sasuke said he could feel Itachi's power after the implant? What exactly happened to Itachi's eyes at the end of his fight with Sasuke? I believe he's simply run out of chakra, he needs to restore his chakra to use his MS again. So the conclusion is ITACHI WAS NOT BLIND WHEN HE DIED AND HIS MS WAS NOT GONE. HE SIMPLY RAN OUT OF CHAKRA.