My issue with this is Fantasyland's properties lend themselves to being in close proximity to one another. I don't think the DW ones do. You'd have to work really hard not to make Shrek, Dragons, Panda, and Madagascar not look like crap jammed up against one another.
In fact, if they're just going to do mini lands for them, split them up. Stick HTTYD in a fantasy land with Zelda (or something similar), Madagascar in an Adventureland, Etc