Just finished Morbius.
In short, Joker and Dr Who became vampires, fought each other, and in the end Joker met Batman.
Honestly though, I kinda liked this movie overall. The story, although has issues, at least only had one villain. It probably could've benefitted a bit longer runtime (it was only about 1 and 1/2 hour long) though, as it felt that it's missing something in the middle. The post credit scene though, it makes no sense. It's a very clumsy, borderline haphazardly put, effort just to shoehorn it into the MCU/Spider-Man universe. The least they could've done was put some in-jokes dialogs between Batman and Joker, but nope, they didn't even think about that opportunity. Instead they had some random dialog that made zero sense.