K Rool, Wolf, and Ice Climbers are who I want. DK and Starfox both need more representation for the amount of games they have. Kirby and Kid Icarus have 3 characters each, while DK and Starfox have a miserable two. This would also include main villains from the series, just as Bowser is for Mario, Ganondorf for Zelda, and Dedede for Kirby. It just makes sense.
We got more FE and Pokemon characters, which we were already well-saturated with... Time to give the other well-known franchises a character or two.
Also, I want Ice Climbers because they're already completed and in the game, and I feel like the 3DS shouldn't limit the Wii U's potential. Make Nana 30fps on 3DS and 60fps on New 3DS, and bring them back.