Not a fan of these type of leaks but Strange already "broke" the multiverse with that spell, if we're following these mistakes and every character makes a mistake, i hope if wanda does have something to do with this, she did something with the darkhold to help her find her kids and somehow Shuma Gorath or the big villain is released because of that, so Wanda and Strange had to work together at the end.
I guess we just have to wait for the first trailer, the poster and the officials hats for the cast and crew of the movie gave me hope of Wanda being a team member in saving the multiverse along with others at the end.