Suggestions by @theultrafancast

Frank Welker

as Scooby Doo in Scoob!

Abigail Breslin

as Velma Dinkley in Scoob!

Katherine McNamara

as Daphne Blake in Scoob!

Jacob Elordi

as Fred Jones in Scoob!

Ansel Elgort

as Norville “Shaggy” Rogers in Scoob!

Charlize Theron

as Mystique in X-Men: New Hope

Jon Bass

as Toad in X-Men: New Hope

Robbie Amell

as Avalanche in X-Men: New Hope

Jeremy Allen White

as Pyro in X-Men: New Hope

David Harbour

as Juggernaut in X-Men: New Hope

Tyler Hoechlin

as Beast in X-Men: New Hope

Olivia Holt

as Dazzler in X-Men: New Hope

Alexandra Daddario

as Rogue in X-Men: New Hope

Florian Munteanu

as Colossus in X-Men: New Hope

Timothée Chalamet

as Dick Grayson in Batman(Never before cast)

Christoph Waltz

as Magneto in X-Men: New Hope

Mark Strong

as Prof. Charles Xavier in X-Men: New Hope

Timothée Chalamet

as Nightcrawler in X-Men: New Hope

Ben Hardy

as Angel in X-Men: New Hope

William Jackson Harper

as Beast in X-Men: New Hope