Kirby Fighters will be a good mode to hold Smash Bros. fans over.
http://www.nintendoworldreport.com/news/36227
A brand new multiplayer mode, Kirby Fighters, has been revealed in the upcoming 3DS title, Kirby Triple Deluxe. The new mode will let up to four players pick one of 10 of Kirby's Copy Abilities and allow them to fight one another in a variety of different stages.
Kirby Triple Deluxe will be released in North America in 2014.