I mean Jean's character may be a teenager (now) but the actress is like 25.. and Feige did mention character is around the same age as Peter in an interview...so if he's around 21-22 then she should be no younger than 18-19.
Either way, by the time The Mutant Saga actually gets its first movie itll be closer to 2028, 2029.. maybe even 2030. Sadie Sink will be in her late 20s (27, 28 yrs old) and the character of Jean Grey should be 3-4 yrs older by then, probably 19 or 20 *if* the character was 16-17 in BND, otherwise the character should be around 22-23 yrs old.
This will fit better too storywise.. if we're going with a high school age Jean as one of the students of Xavier's school in 2028's X-Men it's weird to have a 27 yr old Sadie portraying a 17 yr old Jean-ior 😄
As far as the guys go... if Cyclops is indeed Kit Connor...he's younger than Sink lol. Im sure theres no issues with a Scott Summer of this age. Wolverine will be recast no doubt and yeah theyll be going with a younger dude...probably someone in late 20s or early 30s portraying a... whatever...some 100 yr old Logan.. but looking 28 lol. I'm sure theyll be aging up Jean by X-Men to avoid this teen being pursued by a 28 yr old looking Civil War veteran lol.
