Ib does not stand a chance!!!!! He isnt even close to being on the same level as Zom. King Thor defeated IB!!! Inbetweener very rarely shows up at a powerlevel on par or greater than Galactus. Zom is a far greater threat than Galactus.
First off King Thor beat HALF of the Inbetweener, the Order side. Now I advise you to go to Marvel Wiki and read the Inbetweeners powers and then tell me what you think. I predict a changed mind. He was every part as equals to Galactus and probably stronger in his own universe where his powers are not subject to certain rules. Marvel Wikipedia.