First off, Zoom made an amped Flash look pathetically slow:
http://img401.imageshack.us/img401/5653/zoomspeed1.jpg
http://img5.imageshack.us/img5/8842/zoomspeed2.jpg
http://img202.imageshack.us/img202/7002/zoomspeed3.jpg
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So in the PIS-free environment of KMC where he will be fighting to his best, Hulk will NOT be touching him. In fact, Hulk would be frozen in time around Zoom just like everyone else was (including Superman himself):
http://img593.imageshack.us/img593/6711/zoomtime5.jpg
http://img202.imageshack.us/img202/4968/zoomtime6.jpg
http://img11.imageshack.us/img11/9461/zoomtime7.jpg
http://img573.imageshack.us/img573/9868/zoomtime8.jpg
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This would give Zoom all the time in the world (literally) to deliver as many Superman-esque punches as he wants:
http://img11.imageshack.us/img11/5735/zoompunch1.jpg
It's actually quite laughable to think that Hulk would be able to do anything except stand there like a statue and get blitzed to hell.