It seems this 8th universe will become the 9th after the current Hulk story line plays out. I was sure the present one would be changed either back or forward at some point but not that quickly. This is just a guess but I think Hulk will destroy and then remake everything for some unknown reason. Maybe to right some evil that managed to sneak in at the last revival or some that became present in this one.It does seem to be gamma related or it will not make sense. I have not followed Hulk in quite a long time but Immortal Hulk may be the best book going. I read a couple of the middle issues and decided to catch up.
I am not sure those numbers are accurate. The universe ended in Dr. Strange just recently. Not to mention other times it was started and stopped. We can argue those usually have it restored to as it was but it is still going to be a different stop and start than if it were going on like nothing is wrong.
I would find Hulk doing anything like that pretty stupid honestly.