LEGO Marvel Super Heroes is out now on all home consoles and PC’s but there is also a handheld version of the game built for Nintendo 3DS and Playstation Vita. Check out a portion of Vooks Review of the 3DS version and jump over to the site for the full scoop.
In terms of 3DS-centric features, the game is in 3D outside of cutscenes and menus, which looks really nice. Some characters have abilities triggered through touch input (e.g. Iron Man can fly by swiping up on the touch screen) which is really gimmicky and offers no advantage over tying the ability to a button. There’s also a StreetPass card battle game which battles cards you’ve collected in levels against those of people you pass, but I have no idea how (or if) it works due to there being no instructions.