There are two movies that we know Marvel Studios is planning to release that have not yet been given release dates, Blade with Mahershala Ali, and Fantastic Four.
There are also two place holder release dates in the back half of 2023 for Marvel movies that have not been given titles yet.
Assuming nothing shows up and jumps the queue, it would seem we can expect Fantastic Four to hit in July or November of 2023.
So there’s plenty of time for Marvel to figure out who will play The Thing and the rest of the family, and that’s assuming the movie doesn’t happen later.