Unlikely at launch but possible at some point in time, just really expensive due to how Xbox Digital game slots work. They'd have to buy a slot from another developer unless MS starts to be better for smaller developers.
It's a funny game but it's no longer a "joke" as it's a complete game with a bunch of different characters, modes, etc. It's more than just Kung Lao, the matchups are more than two of the same character. Each have different speeds, angles, specials, and now even a few characters who are completely different than the rest. The game is much deeper than you seem to believe.
Also it's not going to be a $60 game, my guess is $15 but I don't know that to be honest. The top tier players are damn good at it and skill is involved. So you can either go out to dinner or buy Divekick and get hours and hours of entertainment.
The best place for information on the game is actually the Giant Bomb wiki:
http://www.giantbomb.com/divekick/3030-38394/
Also right now, I'm maining Markman. His precision control and just frame kick attack really make him stand out to me. Now I just got to get the just frame timing down.