Really? That’s the part you can’t get into? But the alien or zombified people seem normal though
There's a big difference between how the zombified people and the black paratrooper are presented. The former are clearly presented as being out of place and "wrong," as alternate history elements. The latter seems to be presented as being "normal" and part of the real history, not like, say, the film Black Knight, where having a "brother" in Camelot
was the alternate history. In fact, almost the first half of this trailer is made to look like a regular, historical WWII movie.
Now, if the movie actually ends up explaining why one of the paratroopers is black--perhaps he's not a soldier, but has been inserted into this white airborne unit for this one mission--and the other paratroopers aren't friendly with him (either because of his race or just because he's an outsider), then that might change things entirely. If the film justifies him being there like that, most people could probably suspend their disbelief. If it's presented as though there's nothing unusual about it, though, as if the armed forces were desegregated as the time, that might be a little much for some to let slide, even though it's an alternate history film.
I heard rumours before this might be part of the Clover-universe? Anyone have info on that?
I read somewhere that there might be other Clover-universe films, but they won't be marketed as such--i.e. that'll be part of the twist--so, with Abrams producing this, I can see this being one of them. Perhaps the story is that the Nazis captured an alien or acquired alien technology from a crashed ship and used it in their scientific experiments.