Iron Man needs to stop fighting evil Iron Men
Shellhead fighting terrorists - fine. Fighting aeroplanes - fine. Fighting one evil Iron Monger - fine.
But Iron Man - alongside a more heavily-armed Iron Man - fighting hordes of Iron Man-based drones, and then an Iron Whiplash....Iron Man isn't unique anymore. He should be called 'an Iron Man, one of many'. What makes him special and unique isn't special or unique anymore.
When you watch Iron Man fighting the terrorists, you see how amazing and awe-inspiring he is. When he's just one of many CGI tin suits on a battlefield, he's no longer intresting any more.
There is no Marvel/DC rivalry. Most of the great comic creators worked for both; Jack Kirby, Frank Miller, Grant Morrison, Walt Simonsen, Gil Kane, Steve Ditko, John Byrne, Steve Englehart, Mark Waid...even Stan Lee.