Curious. I've been wondering for awhile how Johnny Depp's starpower would affect the story, the Mad Hatter being a relatively minor character. At least in trailer form he becomes the narrator of the tale. Teasers sometimes use framing or narrator devices that don't appear in actual films in a sort of "presenting!" way ... but this seems more than likely as a way to expand The Mad Hatter's role.
There is a place...At any rate I hope they don't waste too much time explaining things to the audience. One thing that works absurdly well here is how quick you get to wonderland. The initial story points are so instantly recognizable -- fall down rabbit hole, drink potion, meet an odd array of characters (Tweedlee Dee and Tweedle Dum, The Cheshire Cat, etcetera...) before the more dangerous insanity begins -- that I hope the film doesn't dawdle but speeds through its wonders to keep us as disoriented as Alice.
like no place on Earth.
A land full of wonder, mystery and danger
Some say to survive it you need to be as mad as a hatter...
...which luckily I am