Source: marvunapp.com

8. Red Ronin

I'm just going to write out the first sentence of the Red Ronin's OHOTMU bio here, because nothing I could say would explain it as well.

The Red Ronin is a hundred-foot-tall robot, designed by Dr. Yuriko Takiguchi and built at Stark International's Detroit factory, for the express purpose of subduing the mutated dinosaur called Godzilla.

Excuse me one second, I need to remove these sunglasses that appeared on my face as I was typing that because THAT IS THE RADDEST SENTENCE IN THE HISTORY OF MANKIND.

Also, yes, Godzilla was, for a time, part of Marvel universe continuity. Seriously. There are panels of J. Jonah Jameson yelling out the window at Godzilla. They are the best.

So the Red Ronin was a giant mech built in Detroit for the intended purpose of Godzilla-fightin'. Red Ronin wasn't great at that. Eventually the suit was used for eeeEEeeEEevil, specifically to fight the Avengers. Sadly, barring some sort of inter-company crossover, the likelihood we'll ever see Red Ronin fight Godzilla again remains depressingly small.