FAQ for Alice In Wonderland.

Is Wonderland a real world or just Alice's imagination?
No, Wonderland is a real world which Alice is able to enter. According to director, Square Enix confirmed that Wonderland is real.

How does the movie end?
After destroying the dragon, Alice threatens to chop the Red Queen's head off, but this is prevented and she is arrested. Mad Hatter thanks her for everything and the White Queen does the same and will take over the power of Wonderland. Alice decides to return to the real world, but promises she will return. At the wedding, Alice is forced to say "yes" and she does. The film ends with Alice deciding to leave her husband, he does not like this and shoots her and she slowly bleeds to death. As Alice dies, she returns to Wonderland joining the White Queen and her friends in Wonderland.