After more than a year of playing the game, here’s my progress:
29 superheroes recruited with 3 out of 4 limited edition heroes successfully recruited and the 4th on the way and not a penny spent, with only 2 hours a day on average wasted on the game. I’d say that’s moderately successful.
Heroes that I’ve yet to recruit: Daredevil, Dr. Strange, Kitty Pryde, Rogue, Gambit, Beast, Quicksilver, Hercules. Man, this never ends.