The Lion King/X-Men

Heroes
Adult Simba as Wolverine/James Howlett 

Rafiki as Professor X 

Mufasa as Beast/Hank McCoy

Adult Kovu as Cyclops/Scott Summers

Adult Kiara as Jean Grey/Phoenix

Villains
Scar as Magneto

Banzai as Juggernaut/Cain Marko 

Adult Nala as Mystique/Raven Darkholme 

Timon as Sabretooth/Victor Creed