Board Thread:Improvements and Issues/@comment-30535075-20180518203239/@comment-30535075-20180519205746

Even without the novel info, everything I quoted is speculation. The ending can be interpreted in so many different ways, and the one writing here is not the first thing one comes to mind when reading the final chapter. Neither is explained to happen like that.

Two things are confirmed in the manga:


 * The Reiatsu is the remains of Yhwach's power. Aizen said it.


 * The Reiatsu came from underground the debris. Confirmed by Mayuri and his squad.