I dunno. The fact he has children with a blonde woman (RIP) that are much darker skin then Khloe makes me skeptical. Does she even have naturally black hair (which pretty much 100% of half black people do)?
Edit to split: I know Kris isn't blonde. That is the point. He had darker skinned children with a blonde woman (Nicole Brown). So how is he going to have someone with Khloe's complexion with a swarthier woman? Seems unlikely IMO.