Originally posted by LordKaos
How can you destroy Chaos by making Chaos? And then how can you destroy Order by piecing together the chaos you supposedly created into something ordered? And AOA became a reality after the fact, when it was happening it was 616. Which leaves open the question why didn't Roma appear then, I think it's because it was beyond her scope of influence. Reality during AOA was being destroyed because the Phoenix never became Jean Grey to fix M'Kraan. you figure the omniversal guardian could fix that, but her father before could not even make her necessary without Phoenix Force.
Any abstract can be overrided by sufficiently overwhelming power. Essentially, you can "kill" Death if you have enough power. Beyonder did it, Thanos did it. All those universes that were destroyed - it was the death of Death. So it's certainly possible to out-chaos Chaos.
AOA didn't become a reality after the fact - we just spent several months following that adventures of that divergent reality. After the saga ended, we went back to following 616, but AOA went on as normal, just like 616 went on as normal even while AOA was happening. We just can't follow two realities at once.
As for Roma - remember, her role is to guard the omniverse. AOA was threatened, and the M'Kraan Crystal was in trouble, but it wasn't actively destroying multiple universes. So I imagine she was going to wait until things reached critical mass - the way she waited until the last moment here. There's no reason why AOA would be out of her influence, but 616 countless other universes are within her influence.