the op article/report does seem sketchy simply because idris is already playing a viking in the thor/avengers universe. its not like ghost rider/spiderman/xmen where they're each separate universes and franchises
with that said, i root for all black actors to do well but michael b. needs to as far as t'challa considerations. Any of the other 3 actors named, as well as aldis hodge as someone mentioned, would be fantastic choices. I wouldn't mind one bit if they went the young actor route with hodge or boseman but if there's any validity to this then id root for chiwetel to get it, and of course idris is that dude too! (unlikely, again, as that would be)
chris evans can play human torch adnd captain america
id rather elba be like a elder of the tribe