He could easily be someone trying to get a cut of the pie. But there's no proof as of yet. Either way doesn't change anything, if it's true then it's not that surprising considering it's Hollywood.
I doubt it
There's way too much that he tries to accuse Matt of that are flat out just Batman tropes for me to find this believable. If he really did write a pitch (of which he'd obviously need to do his research on via reading the comics), he'd know those are just basic Batman tropes rather than "owned" by him.
Like, he's gonna try and take credit for the idea of Gotham being a corrupt ****hole or the basic trope of a serial killer taunting over more murders to come? ****ing really?
A lot of the other plot comparisons are pretty reachy too
The plot relying so hard on Bruce's identity isn't in The Batman. Not in the way this dude wrote, anyway.
The whole "private hells" thing sounds like he just ripped off the "reflection" part of Dark Knight Returns with Two Face.
Trying to claim the plot synopsis is his is like claiming I own the plot synopsis "James Bond goes abroad to fight an evil mastermind and ends the movie in bed with a woman"
Riddler's stuff can just as easily be explained as inspired by the Zodiac Killer
The "big reveal" is flat out wrong lmao
The main bad guy of a movie wanting to kill everyone is the most basic trope in fiction
Joker didn't manipulate Riddler
Uslan's video is literally him simplifying his job so it can be explained to a child
And his threats of his next video are stupid. If he had anything substantial, he'd have put it in his first video. Not save it for a second.