Saw it at Gencon over the weekend. Models are a bit large, but .. well, superheroes, right? The majority of the terrain they used were O Scale buildings. I believe several of the Privateer Press guys did, in fact, jump ship from Privateer to start this game (or help develop it, or something...). I didn't get a chance to try the rules because the guys who were trying the demo were taking forever. Like 15 minutes between rolling dice. No idea what they were doing, other than making folks pretty annoyed.
They do offer some additional terrain. I saw a newspaper stand and some cars. The cars were just plastic shells. I think some toy cars would work just as well.
The Hulk is sufficiently large. My favorite, though ... MODOK.