Gundam Unicorn

[Fox]

Either that or this guy's being set up for an epic death in a future UC series.

possible but it would most likely be epic ... it SHOULD be epic.

I'm imagining a scenario where he ups his killcount by slaughtering a couple squadrons of grunts and maybe a battleship or two before he gets taken out by the enemy's new ace pilot.

would be nice that the main protagonists comes in to save him before the final blow is struck

Nope. I want the character to be something like a big-brother mentor to the new protagonist. Then, at some point mid-to-late-series, the bad guys disable the protagonist's MS and she/he's helpless to do nothing but watch as Mr. Badass Byalant Pilot buys the farm.

It's the usual plot-point anyway.