If this movie has shown me anything, it’s that Lego Batman is a dick, whether it’s in this more canonical version or his less canonical appearance in the Awesome Lego movie. Here he’s not a complete jerk, but his reaction to Superman’s honest Can I help you?-attitude comes of as less than mature. Plot-wise this story seems to take inspirations from a couple of comic stories, though I’m not sure it’s actually a direct adaptation of anything.
Lex Luthor has teamed up with the Joker to get elected as president, hoping that using Joker’s mind-controlling gas will help with all the votes. This has forced Batman to team up (reluctantly) with Superman and try to stop them. Honestly, the plot is thin, but serviceable and it keeps the action going. It’s not like anyone is watching this for the plot or deep characterization anyway. It’s because we want to see DC superheroes as Lego figures and in a DC universe entirely made of Lego bricks and some mayhem and action along the way, and in this regard the movie absolutely delivers.
Lego DC Comics: Batman Be-Leaguered (2014)
A 20 minute short that is mostly an excuse for Batman to visit the various Lego versions of the heroes of the Justice League and fight together with them against some of their more known enemies and finally to get Batman to join the League. Has either the most annoying or the most fun and meta super-villain of Batman’s villain gallery (depending on how much you can take camp and general weirdness over the usual Batman grim’n gritty).