Make Ironman the champion he deserves to be
In regards to the MCU Ironman is arguably the best character. Yet in the game he isn't the Ironman we all know and love. This will regard my opinion on what will make Ironman the fun character he is meant to be.
First of all, Ironman deserves greater attack rating. He has been for to toe with Thor and you know he should be able to pack a punch.
Ironman can get fury buffs or his armor break abilities should be at the power of or greater than Gweenpool's armor break.
On the defensive side of things, Ironman should have an AI, such as Stark Enchanced Spiderman. The AI should allow him to start each fight with 3 permenant armor. Dashing back and blocking for x seconds should also get Ironman another armor. If struck by a heavy or special attack the armor would need x seconds to reboot. His special three should also allow Ironman to convert his armor stacks into health or power. If possible his AI should also help increase his attack according to his combo meter.
Last but not least, he needs a fresh set of special moves:
His first special can be a repulser blast and then a flying punch which has a chance to inflict stun.
His second special can be repulser blasts from his chest and hands which inflicts armor break.
His third attack can be a combination of missiles and repulser blasts which also has a 100% chance to inflict armor break and stun.