I have no problem RPing DCCU, but I really feel like yo're limiting yourself greatly when it comes to that. As far as like, general knowledge pertaining to DC comics, you are literally using an internet connection right now. When in doubt, google, my friend. However, if you're still deadset on Cinematic Universe only, I am willing to set something up for us. Or, at the very least, run some ideas past you. Just remember, Cinematic Universe means Affleck-Batman.