Since last year the CBM fatigue has really kicked in, bad products produce bad reception, is simple as that.
This year the only big one could be D3 and that is not even guaranteed if the movie fails to click in.
For 2025 and forward, the industry needs to bring something new or the genre it's going to suffer the same fate the 90's action flicks had.
The X-Men are not huge, BO wise they have never been big. None of the previous films managed to do more than 770M