Scarlet witch movie

I have a theory about the untitled movie that is set to release between between doomsday and secret wars. From what I've seen from people speculating is that it's dr strange 3, thor 5, shang-chi 2 orrrrrr a scarlet witch movie. While the first 3 options seem very likely I don't see why the secrecy is necessary for any of them. But when it comes to a character whose fate is unknown and is heavily speculated to be alive, the secrecy would make a lot of sense. My guess is wanda either comes back at the end of vision quest or the post credit scene of doomsday has a hint(i keep picturing the camera panning to a snowy rubble and we see her crown coming out of the snow and then it starts shining red. Movie ends) and then chaos ensues. I also picture the movie revolving around her fighting off >! mephisto !<. What do you think?