No way is Inbetweener beating ZOM!!!!! ZOm nearly killed Eternity and Dormammu it took then both to restrain him so he would destroy the universe neither one could come close to hurting him. Im sure the LT could defeat ZOM but outside of that his evil is pretty much at the pinnacle in marvel. He is so powerful you probably will never see him at Full power in the marvel universe again. Even the Chaos Lord couldnt get him to obey and he was a universal threat in power. ZOMstrange refused to obey or be controlled by the Chaos lord in the Incredible Hulk book. THats how powerful ZOM is even the most powerful threats dont strike fear into ZOM.
Read his powerset at Marvel Wiki and tell me no way after that. IB is a low level IG.Also either master can empower him further to maintain the balance in their universe, so if Zom is disruptive to that balance, Zom will be going one way or another. If IB can alter reality on a Cosmic Scale then he can handle Zoms destruction.