Deadpool 3 is sure to have several cameos, with one major character in the movie being Hugh Jackman's version of Wolverine. There's still a lot that hasn't been confirmed, however, including the movie's villain. Given the multiversal nature of the sequel, however, there's one enemy of the X-Men who would fit perfectly into its premise.
Source:https://www.cbr.com/deadpool-3-mojo-x-men-villain/