Funny that I see that so soon after replaying the original (and by far the best) Marvel Vs Capcom on the recent Origins double pack I got off PSN. Onslaught certainly DOES get frickin' huge when you beat his first form and he's far from being the only boss who in video games who does.
Urgh, I am not happy with what I could vote for. Guys, bosses are not pokemon! They do not get bigger when they transform, they get closer to destruction!
More evil, more firepower/desperation blabla but not necessarily bigger!