A. Possibly, I don't recall human DNA though.
C. Yes since Indo's a tragic tale.
D. In real life spinosaur was arguably more powerful than T rex possibly because of the longer forelimbs. So I would say a combo of the two genra would be more powerful than a regular T rex.
E. Not sure actually.
2. No, however it is thought we evolved from Australopithecus sediba who in turn gave rise to H. habilis/rudolfensis, H. ergaster/erectus, H. heidelbergensis aka Archaic Homo sapien/early Neanderthal. Personally I think H. habilis/rudolfensis/georgicus and maybe ergaster were not Homo (human).