You have a good insight of what may happen but like i've replied to others nothing's mainly confirmed as of now but I don't really see how it's going to help if they send the Juubi to the moon?
The Juubi is an out of control tailed beast as of now, theres no knowing if he will calm down once Madara and Obito are defeated and Sasuke hasn't exactly demonstrated that he can control a Bijuu let along the Juubi.
To be honest it seems a little too far fetched for Kishi to construct the end this way, even after putting allot of hints throughout the manga.
You are right about Sasuke controlling Juubi & Bijuu.
My input were based on ;
Firstly; Sasuke had his Brother Itachi's eyes - of which the Sharingan highest level. Such as Amaterasu.
Just like Kakashi using Obito's left eye, which activated the Sharingan Kamui.
Next. Just like Madara's Susanoo, Sasuke did manage to use the Susanoo (maybe the smaller version).
Sasuke did finally seen Naruto's power. Sasuke went into Naruto mind and saw Kurama power and suppress it.
As for other type of sharingan jutsu, Kishi has yet to reveal, if there is.
As for Naruto, those Bijuu had align with him. This will certainly giving Naruto some advantages.
For Juubi, even both Madara & Obito cannot control. Most of the time, they cover the Juubi eye.
This would said that Juubi was indeed part of SO6P elder son, The Eyes power. This mean that only Uchiha could control.
As for Naruto, he had 2 types of power. Life Force and SO6P cloak. Life force was said to be Uzumaki Clan bloodline (SO6P).
To understand about Naruto SO6P cloak, the need to know about Kurama chakra.
When SO6P Knew he was going to die. He extract the Juubi's Chakra into 9 portion. As he was also had the power "To Create Things Out of Nothing" he then created the shell for the 9 Bijuu and the actual Juubi shell was the Moon.
The last portion of Juubi chakra to put into the 9-Tailed Kurama. And he included some portion of him into Kurama.
Just like Minato, which he included his chakra and Kushina chakra into Naruto, so that Kushina could helped Naruto to gain Kurama chakra.
So, when Naruto finally gain some Kurama chakra, he indirectly gain SO6P chakra. This could be explained on how he has the SO6P cloak when in Bijuu mode.
SO6P last words was mentioned by Kurama, when Naruto had access into Bijuu inner self. He had to include some portion of him. This was so that Naruto would control the Juubi itself, just like him. If not, the Naruto World would be in chaos when no one can control Juubi.
Conclusion.
As Sasuke could use his sharingan eyes power to retrieve the Juubi shell (lazy to check the actual name).
Finally, all 9 Bijuu have become One (Juubi).
With both Sasuke and Naruto combined (required) and send to back to Moon.
With Juubi keeping watch on Naruto World.
** Some were facts in the Naruto Manga. The others were based on comparison similarity (Kishi like to re-use some).
Thanks...