Since I have been pitting the Inbetweener against some characters recently, he could come in hear with his Masters backing or Zoms opposite and possibly destroy Zom for good. Inside the IBs universe he is unbeatable pretty much by outside forces unless it involves MO & LC.
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.