Looks like Michael B. Jordan is Johnny Storm.
And rumors keep saying Miles Teller is Reed Richards.. He seems kind of young but I like the two of them together.
With how young they seem to be going - I have no idea who I envision playing The Thing.
Kit Harington and Richard Madden are also rumored for Reed, and Kate Mara and Saoirse Ronan are up for Susan. All of those actors seem too young for those roles, but I've never been an avid FF fan, so if it works for the story, I'm cool with it. Been watching House of Cards
recently, so Kate Mara is relevant to my interests.
My only concern, which as been mentioned plenty already, is the unnecessary confusion of Sue and Johnny not being the same race. I'm all for tweaking source material and incorporating more diversity, but maybe Reed or Ben should have been changed instead, or both Johnny and Sue.