Adventure Time, Macross, Sherlock, and Japan also in the running
Of course, LEGO can also block a set if it's deemed impractical or there are licensing issues and Legend of Zelda-themed LEGO have made it this far before. But maybe the new open to licensing and partnership Nintendo will make this happen?
It actually seems more likely than Macross LEGO happening. But less likely than Adventure Time getting the green light.