The Frozen and the Eagle

Rainbow Dash, Applejack, Fluttershy are sent to a frozen America where they meet humans, good and bad, but also meet the worlds monsters and mutated animals. Princess Luna, Twilight, Rarity, Pinkie Pie are sent to the Amazara Kingdom where they are caught up into the tensions of the surrounding kingdoms all the while a creature long thought dead rises to take control of it all.