Raven and Beast Boy have a silent pact, along with the rest of the Titans not to say anything about Raven’s love of Tim Burton’s films. They just casually always put any of his films on if their showing and Raven will intently watch from where ever she is.
If Bart had gone back farther in time (in YJ) he would’ve formed a prankster trio with Jason and Gar on accident. They would’ve been the best of friends, and Bart would not have believed J had died because “mom said she met him and she hasn’t been born yet! She said his boyfriend was awesome, too! He can’t be dead until I’ve met his boyfriend!”