Use this as a tool for your locked and private stories to cover up major reveals or plot twists. Also Use It To Make It Mean You Can't Find The Person For The Role.
Straight after batman 2, John Stewart, martian manhunter, and hal jordan come to Bruce wayne to give out a warning on a huge threat coming sooner then time it's self, as they all set up a team bruce wayne finally after all this time meets kal-el.