Board Thread:General Discussion/@comment-28651072-20161112031348/@comment-1290700-20171014031457

Each series has a combined total of 20+ hours of animated content, spanning 47-50 episodes and 1-2 movies on average. You're bound to find something somewhere that connect to the next series by complete accident; we don't even know exactly when the groundwork for the next series is laid.

That said, I believe we are now on Trademark Alert - Toei's probably already filed, so it can't be long until it goes public.