apes or no apes

Cromag.....and Homo sapiens sapiens merging into one species . Kinda like the Europeans that melded with the Chinese into oblivion. There is some evidence that suggest Eastern Europeans inhabited parts of China hundreds of thousands of years ago. I saw it on Discovery Channel, (so no I dont have the reference.) But is is plausible that Neandertals and Cromags and modern humans could have all interbred into one common species extant today. Just take a look at Lou Farigno from the old Hulk shows. LOL. Or is this just Crap on my part? As far as the possibility of modern humans evolving on another planet and being transplanted here , well even if worm hole travel was possible side stepping the speed c limit. Did these ET's just drop the poor bugger off and say good luck buddy, watch out for them cave bears.!! Just a thought..