Here's why it's difficult to predict a cast:
* The X-Men franchise is currently in a state of flux. Disney's acquisition of Fox has given them control of the X-Men characters. While we know they're planning on incorporating them into the MCU, how and when is still unclear.
* The previous X-Men films have had various casts. Some actors like Hugh Jackman (Wolverine) and Patrick Stewart (Professor X) have already retired from their roles. It's highly likely that a new cast will be introduced for a potential X-Men 4.
* Marvel is known for keeping their plans secret. We likely won't have any concrete information about X-Men 4 until official announcements are made.
To stay updated on any potential developments:
* Follow Marvel's official channels: Keep an eye on their social media and official website for any news or hints.
* Pay attention to industry news sources: Sites like The Hollywood Reporter, Deadline, and Variety often report on casting announcements and production updates.
While it's exciting to speculate, it's best to wait for official confirmation from Marvel before making any assumptions about the cast of X-Men 4.