Where was Shuma gorath during the chaos war?

Im not the most hardcore comic book fan out there but i recently got a chance to read the chaos war and i cant help but think where the hell was shuma gorath at the time? do you think his presence would have changed the story in any way?On a side note where were dorammamu and cytorrak an explanation would be much appreciated. If he did in fact appear can some1 tell me what issue it was