Rogue vs Monarch
rogue from uncanny avengers 21 who tried stopping the celestial. her new task is to stop monarch. can the combined power of hundreds of avengers topple monarch...?
note: she is unable to absorb his power. even if it were possible, she would utterly lose control and autofail.
this is a kill or be killed scenario--essentially YOU control rogue and the powers and the cumulative power of any avenger you can name, except sentry who has proven immune to her power.
She'd actually absorbed a bunch of X-Men too, with Tony claiming it was nearly every on Earth by the end.
Us just using the powers might be interesting, but Rogue's body is ultimately the problem. Rogue isn't quite like Hope. She was being ripped apart mentally and physically holding in all those powers, and couldn't even stand up unassisted when they went to get the X-Men.
And the actual event was so short and only required her to fly and push the celestial. I don't know how functional she'd be in a full on fight bearing that load.