Deadpool 3 (2024)

"Deadpool 3" or "Deadpool & Wolverine" is likely to feature Henry Cavill as a Wolverine variant. In November 2023, Marvel confirmed that Deadpool 3 will now be arriving in July 2024 rather than May 2024. It's now in the unusual position of being the only MCU movie to be released this year.
However, there's so much to look forward to that it would probably be the biggest Marvel release this year