To add to the case for having Dixie Kong as a guarantee on the roster,
+ Robin/Lucina reveal means decisions were always in flux and never final.
+ would be silly not to add in another DK rep especially after its resurgence.
+ planned for Brawl anyway.
+ She's always third in line after Donkey and Diddy in games (DKC, Donkey Konga, Mario Baseball, Mario Hoops, Barrel Blast, etc.).
+ Besides Tropical Freeze, she'll most likely appear alongside Diddy in Diddy Kong Racing for Wii U if the rumors are true like she did with Diddy Kong Racing DS port.
+ She was a marketing tool for Nintendo to gloat that they're more aware and focused on including female characters now (Dixie in Tropical Freeze, Peach/Rosalina in 3D World, 3 versions of Peach in MK8 lol). Not joking, their press releases literally signaled them out.
+ If all else fails, Diddy clone with new neutral and Up-B moves.
+ Sakurai might perv out again and post a pic of her in a salacious position with another female.
+ She'll be in Smash eventually. But there's no way she'll have no-name losers (Chorus Kids, Shulk, Lucina, Robin, Rosalina, Greninja), canonically irrelevant losers (Mii, Wii Fit Trainer, Villager), and losers who needed their franchises to be resurrected (Palutena, Little Mac) to get one Smash generation ahead of her.