Bundle Stars, have, amongst their other offers, 5 Lego Super Heroes games for $15 USD
Lego Batman
Lego Batman 2
Lego Batman 3
Lego Marvel Super Heroes
Lego Avengers
Plenty of other bundles, including the previously posted Batman Arkham game bundle here:
Lego Marvel Super Heroes is fantastic. I think my daugther and I sunk 70+ hours into since the time we got it. Fantastic entertainment.