Right. It might be that Hulk will redisign the Iron Man armor into something that you set and forget, but I suspect that at some point he'll become less than discriminating in his destruction.
The Hulk isn't subtle, his rage will almost certainly put innocents at risk, and that's not something that either side of the registration debate will stand idly by and watch. Heck, it's more than possible that the heroes on either side won't stand idly by and watch ANY lives be endangered without springing into action. The enemy of my enemy is my friend. Hulk will be the common enemy, and the common ground bringing the sides back together.
All speculation of course.
I'm not totally sure I follow. If I'm understanding this right, I'm not sure that there are many people that would consider the Hulk a hero, so I'm not sure how he could push the pro-reg point. Keeping in mind that I have no idea where the Hulk's intellectual level currently sits.