I heard she's locked for both Justice League movies and Wonder Woman 2. That's why I am not sure if this is even real news, though I really want it to be. RDJ was famous before Iron Man, he was famous from the 80s, he was nominated for an Oscar in 1993. He was just seriously recovering when Marvel picked him up. Gal Gadot is just starting up, she has supporting roles behind her. I don't think they will ever get paid the same.
Flashpoint is a reboot, theoretically, it's how DC started the terrible 52. They could make it an elseworld story, but I am not sure that cinema audiences are ready for that. Let's wait for a synopsis, but even if it is a reboot, most of the actors will be staying.
Gal Gadot did such a great job as Wonder Woman and with all the press junkets. I love Marvel, but Brie Larson (Captain Marvel) so far does not impress me during interviews.
Suicide Squad was horrible, but BvS had unrealized potential in it.
Also thank you for such a great and elaborate response.