They are two of the most isolated and safe realms in all of fantasy, now a threat that no one expected has invaded OZ and Wonderland; now both must call upon their heroes in a fight for the very existence of these worlds.
The Great Battle for OZ and Wonderland has begun.
The Disaster - The Dreaded Conquerer Pan
The Boy Who Never Grew Up has been around for ever, and he has grown bored of Neverland. Jealous of the fame and popularity of Oz and Wonderland he has decided to get rid of both worlds and make a New Neverland out of the ruins. Armed with an army of Lost Boys, Pirates (who follow him ever since he overthrew Captain Hook), mermaids, and Fairies (whose Pixie dust allows them all to fly), he has an unstoppable force with which to conquer these realms; his invasion starts with OZ where he attacks the Emerald City, after which he plans to invade Wonderland. That is if he can overcome the forces allied against him.
Alice and Wonderland
Having seen the tyranny of the Queen of Hearts, Alice will do anything to prevent the same fate on Wonderland under Peter Pan. So when Alice hears of Pan's invasion on OZ, she and her friends, including the White Rabbit, the Cheshire Cat, and Mad Hatter, mobilize the forces of Wonderland to help stop the Neverland and help defend the besieged Emerald City. Armed with looking glasses to teleport her forces, which include the card soldiers and chess soldiers, as well as with the magic of Wonderland, such as size-changing mushrooms, Alice helps even the odds against the forces of Pan.
The Great and Powerful Oz
Of course, the Emerald City isn't completely defenseless, it is defended by the likes of Glinda the Good Witch, Dorothy Gale and of course the Wizard himself. Even the Wicked Witches of Oz have come together, they don't want to see OZ destroyed either, because they want to conquer it themselves someday. Calling on all the peoples of Oz, the Wizard leads Winkies, Munchkins, and of course the Winged Monkeys. Together, their magical skills, and the alliance with Wonderland, they might just overcome the villainous Peter Pan.
While the combined forces of OZ and Wonderland were able to drive back the Neverland invaders, it was at great cost losing such characters as the Cowardly Lion (who fought bravely till the end), as well as the Mad Hatter and the White Rabbit. Alice knows it won't matter if Peter Pan is alive because he will be able to return. She therefore resolves to challenge him one on one, and end the battle before anyone else is lost. In their fight she struggles to beat him as he can obviously fly, she starts to tire and is dealt several fatal blows. However, confidant in his victory, Peter Pan fails to notice until too late when Alice is able to slip him a shrinking Mushroom, causing Peter Pan to shrink out of existence. Victorious, Alice succumbs to her wounds and dies a warriors death on the field of battle. She is forever remembered by OZ and Wonderland as their hero and savior.