Board Thread:Super Smash Bros. Discussion/@comment-25462958-20140925145732/@comment-24529455-20141024205011

If they add more DLC characters, I think Balloon Fight might be one of them.

Reasons:
 * He's a retro character that many people know and like
 * He was considered for Melee along with Pit, and look where Pit is now.
 * The original Balloon Fight game is in the Masterpieces for Wii U.
 * He has a freaking STAGE.

Of course, you may say that all this Balloon Fight stuff is only related to the Villager and Animal Crossing, and you could be right. But judging from this, I think that Balloon Fight has a higher chance of DLC than most.