Aside from different arms, difficulty modes and online play there's not a butt ton of repeatability in arms. Still a lot of fun. If you haven't yet, check out the 3d printable arms joycon and knuckles. Dope af.
The lego batman movie rocks as a standalone universe with characters from other franchises. Joker could've been improved with either Hamill or Troy Baker. I get that the movie's a different tone but i just wasn't feeling it. I'd be down for a sequel though. And yeah, it came with a mini lego bat-wing and no batman figurine. Boo.