What is room 46? Kyoraku said he had business there. The two things that come to mind is central 46. And maybe aizen a prison. And why do you think he is goin there. I kinda hope it is to free Aizen somehow. Although I am not sure what role he should play seeng as how the enemy are already out numbered.
Yep he is going back to Aizen .
> Might Release Aizen on some condition to fight against Yhwach and ally with Gotei 13 .
> Definitely there is a chance Yhwach can bring his sternritters back alive and Kyoraku must have analysed RG losing to Yhwach
> This is were logic comes in Yhwach 's Sternritters may turn Rouge and Aizen will offer them Hogyoku's Power the theory is bit far fetched but is completely possible .
> Yhwach's Power becoming One is really dangerous dead quincy powers goes back to him . Aizen's role may be important to stop Yhwach Growing Power.