Not much has really changed between the last two LEGO Batman games, at least not where visuals are concerned, but considering the main design elements in all of these games are plastic blocks, that isn't really an issue. That being said, the game looks great on the Xbox One and if the developers at TT Games hadn't captured that iconic LEGO look before, it does show through on the new system.
While the visuals don't change much, the game's locations do, and those new areas are rendered rather well. The player is no longer confined to Gotham city as the name suggests, and actually, a major part of the story takes place out in space or on strange alien ships and planets. As a result, you can expect a much wider range of designs in the levels, and those designs all appear to be rather well executed.
As far as the game's audio is concerned, like LEGO Batman 2: DC Super Heroes, all of the cutscenes are fully voiced. Troy Baker returns as the voice of Batman (and many others) and Charlie Schlatter returns as Robin. Lex Luthor is once again voiced by Clancy Brown, while Dee Bradley Baker plays Brainiac, the game's main villain. Other prominent voice actors include Stephen Amell playing Green Arrow (just like he does in Arrow) and Adam West playing himself and the 1960's Batman. Other cameos include Kevin Smith and Conan O'Brien as themselves. Both break the fourth wall when they appear and both provide an amusing amount of comedic exposition.