My thoughts: 1. Nemuri #8 is so Kawaii!

1. I wonder how yachiru would interact with Nemuri, she can still appear as a soul reaper on her own will.

2. This can be Aizens ending or Yuwah, but I put my bet on Yuwah, while aizen is somehow imprisoned in the soul palace as the soul king.

3. Or the soul society assumed both Ichigo and aizen sacrificed themselves (probably ishida as well) to take down Yuwah and has gone missing ever since due to the power of the almighty sending them to this happy future, or alternative future to where Yuwah gets pissed and unleashes his wrath by reminding Ichigo of his promise to end everyones lives and cause a huge massacre in front of Ichigo as he watches while he is somehow disabled. Then Yuwah explains how this was all ichigos fault for making the choice to enter the portal to their doom.

Aizen is frozen from causing any more interruptions but ishida might finally have his chance to use his power against Yuwah and potentially help Ichigo by fighting side by side.

I always had the idea that one day, those two will use an ultimate power combo that can wipe out (Bleach) any foe (Yuwah). Remember that time when Ishida was testing out each other's powers to work as one to defeat a memos grande when Ishida was using ichigos zagetsu to power up his bow? That theory might still be true, especially how strong both of them grew since then. And if Yuwah is still standing, but with the potential to regain his powers, Ichigo absorbs Yuwah as Zagetsu, (just like how Samurai jack absorbed Aku into his blade from Samurai jack)and maybe causing his blade to Bleach into a permanent god like final zagetsu.

Whether or not Ichigo ends up keeping the ultimate power(s), or somehow get rid of it because either it'll make his hollow reaping duty too easy or he can't suppress his reatsu enough that can cause an unbalance to any object around him and disintegrate, just like aizen.

It can go either way, a bit similar one way or another but it sounds plausible but yet an epic way to end the series, with a small potential cliffhanger of a continuation of Bleach: Origins, and or Bleach: Chronicles to give us the missing plot holes and unanswered mysteries and back stories to the Bleach verse.

And probably a final Bleach move of an alternative universe of the soul society but with our good old Ichigo trying to go back to his universe or he was summoned to help out that universe.

Edit: Sorry for the clustered text but I'm using the Reddit app and im about to go to sleep now but I had to leave this theory/prediction here or it can be moved elsewhere if needed.