What John Ottman hadn’t counted on, though, was Byron Burton’s script actually intriguing him enough to want to pursue its production. Set in the same ‘80s period as X-Men: Apocalypse, this film would have pitted Hank McCoy against the science of his mutation, and another mutant with a similar affliction, who just happened to be terrorizing an Inuit village. Alas, even a polish pass by Ottman, and a connection to previously theorized big bad Mr. Sinister, couldn’t save the film from its ultimate demise.
Article source: https://www.cinemablend.com/news/2475077/beast-could-have-gotten-his-own-x-men-spinoff