TT has done nothing but create LEGO games for the past decade it feels like. It's good to see them mixing up the same formula from time to time. DC Super Heroes is what you'd expect in any LEGO game in terms of gameplay, but adds a large open world HUB like that of a condensed GTA game.
Like Harry Potter had the school and Indy had a library as sort of home base, Batman 2 has Gotham. You can drive vehicles, unlock new areas/characters/levels/etc., kill enemies, get tons of studs, and so on. You could technically just wonder aimlessly here forever if you wanted, but you'll want to complete the actual campaign.
The graphics are updated and gameplay seems pretty smooth. The puzzles are plentiful, but my constant complaint of not knowing what to do or where to go at times is still here. At one point I wondered the city for an hour, only to realize I was supposed to go to a certain color light in the sky to find my objective. Nowhere during a wasted hour did it say anything about where to go or what my actual campaign objective was.
Playing with characters like Superman is just awesome, but a little unfair. Superman can blow out fires, use lazer eyes, can fly, and also has infinite health. He can't die. I loved seeing the Penguin, Joker, Lex Luther, and more nemesis to these super heroes, not just Batman's.
It will take 10 hours at least to get through the 15+campaign levels, and getting 100% completion is irrelevant. You'll need to stare at an online guide to find all the hidden secrets, collect all studs, and then replay every single level in free-play to get the secrets as a different character.
It's the same LEGO game you've played before but with a few additions. When are they going to add online play or other stud collecting/survival modes, or anything new? TT needs a break, go explore other designs.
I would normally give this game a 8 or 9, but it has some painful bugs. Not only did I need to reload from a save spot a few times because my character got stuck on some glitch and couldn't move, but at the end of level 12 a bug causes it to crash during the cut scene. I replayed it 3 times (each time it crashed) and even tried some "fixes" from checking online forums. Nothing worked. So I mailed the game back. It is disappointing, this is a really fun game.