I can totally see GL as an M&M campaign run by a GM who doesn't give a fuck about PL limits. I mean, first goddamn episode: GM's running a game that's theme is challenging authority. An entire session of roleplaying later, he realizes the two players aren't going to actually fight his first BBEG. In between that session and the next, he gets another player in on the game. He decides to make the game a little less literal as far as the theme goes. Tell Simon's player he found something cool. Drop the first mech, introduce new player. Some running around and Simon's Burrowing wankery later, that cool thing you found is a mech. In an obvious, "You're not going to be able to do this later," fashion, all three characters are crammed into the one-seater mech. Combat slogs on, they can't seem to significantly hurt the other mech. All of a sudden, Simon's player decides to stunt his Burrowing power into an attack fluffed as a massive drill, extra efforts the fuck out of it and goes full +5 Power Attack, Kamina uses the Leadership feat to spend Hero Points on his behalf, Yoko aids action, and they blow the motherfucker through the ceiling.
The players decide that worked pretty well and resolve to find bigger and better ways to use that same tactic fluffed differently for the rest of the campaign. GM hands out power points like candy, Simon spends them on a wonky mecha-targeting Possession/Gestalt power, Kamina picks up three ranks of the Teamwork feat and craploads of Lucky. Kamina hijacks another mech. Hijinks ensue.