Like how Cranky Kong was the original Donkey Kong, The original Mario (or "Jumpman") is Mario's father
Mario was Brainwashed by a younger King K. Rool in Donkey Kong Jr.It's possible.
The enemies of the next Donkey Kong Country Returns game will be aliens.
Pauline was actually Princess Toadstool/Peach in disguise.Peach fled the Mushroom Kingdom and hid out in Brooklyn as a performer named Pauline to escape Bowser and the Koopas. She and Mario became close friends before she was abducted by Donkey (Cranky) Kong, who was working for Bowser. When Mario saved her from Donkey Kong, she revealed her true identity to him and asked him to come save the Mushroom Kingdom from Bowser. Mario, along with Luigi, followed her there, where Peach was kidnapped by Bowser. The rest is history...