Old Republic trilogy, calling it now.
Whether Revan is in it or not is up in the air for me (I’d say it’s likely to include either Revan or Bane), but I bet Mandalore will be a major focus.
I am thinking more “Dawn of the Jedi”, seeing of TLJ deals with The First Jedi Temple in some capacity, it would make sense to use Johnson on a trilogy dealing with that.