Finally got around to playing this one.
It's very much a competitive choose-your-own-adventure. It's not straight conflict like Ace of Aces, but it does have various battle encounters.
I played the Kingpin, and my friend played Daredevil. The book was well-written, with only one or two typos, and was chock-full of guest stars from the Marvel Comic Universe.
Like a choose-your-own-adventure, a seemingly good decision can totally screw you. I almost died early on without warning, and ended up winning the game because the other player took the wrong choice in a 50/50 chance.
It's not as replayable as I thought it would be, but it has numerous cool plots that we didn't even touch on in the first game.
All in all, if you like comics or enjoyed choose-your-own-adventure books, this is probably worth the couple of bucks it will cost you on eBay. Just make sure to get both books!