DanielRPK:Beast from the Fox X-Men, played by Kelsey Grammer, will appear in The Marvel's post credit scene, and supposedly will be the merging of the MCU with the Fox universe for Deadpool

Kelsey Grammer's Beast Rumored For Post-Credit Scene In The Marvels

Kelsey Grammer says he'd love to play Beast in the MCU X-Men movie

Kelsey Grammer Breaks His Silence on MCU Return as X-Men's Beast

notausername (u/juan602) - Reddit

Before the strikes, Hugh Jackman had a meeting with Kevin Feige to talk about Wolverine having a big role in 'AVENGERS: SECRET WARS'. (via: @ DanielRPK) : MarvelStudiosSpoilers

He's too old to be the MCU's Beast: Industry Insider Fuels Major Speculation of Kelsey Grammer's Return in X-Men Reboot - FandomWire

Kelsey Grammer all but confirmed the X-Men will join the MCU soon

Kelsey Grammer is confident that we'll see Beast in…

Kelsey Grammer Returns as Beast in 'The Marvels' Post-Credit Scene - Knight Edge Media

Kelsey Grammer Threatened Disney To Bring Him Back as Beast in the MCU 2 Months After Hugh Jackman's Deadpool 3 Announcement - FandomWire

Apocalyptic_Horseman (u/Apocalyptic_Horseman) - Reddit