two scientists two giant egos one wears a tankone is a tank tony stark and bruce banner are science bros and when a fellow bigbrain goes missing the two heroes take bets who can find him first its amazing race avengersstyle as iron man and hulk embark on a global manhunt with the ultimate prize at stakebragging rights but what happens when a 20 millionyearold evolutionary catalyst infects the hulk the avengers must find the missing scientist before he and his order of the dragon unleash his bacteria on the entire world plus the black widows sins have resurfaced widow spiderwoman and hawkeye travel to siberia to search for a missing girl with ties to an old soviet assassination but the truth behind this girls disappearance may be more than the avengers are prepared to handlecollecting avengers assemble 913 annual 1