Time for some more GameFAQs stupidity:
King K. Rool is almost the Waluigi of the DKverse, all he really has going for him at this point is fan popularity. Admittedly he has more of that than Waluigi, and less competition in his series than Waluigi...but I really think his chances are overblown more than anyone else at GameFAQs. That said, I suppose he is the most likely DK newcomer (just barely ahead of Dixie since he's a primary villain), but I subscribe to the train of thought that there won't be a DK newcomer at all. Nintendo and Retro have basically all but said that they don't think K. Rool is vital to his own series by completely shutting him out of DKCR and its 3D port.
My thoughts in order of likelihood:
No newcomers >>>>>>>>>>> K. Rool > Dixie Kong >>>> Cranky Kong >>>>>>>>>>> everyone else
At least this post was comprehensible.
However...
Tiny Kong has more support than Cranky Kong, Lanky Kong, and Donkey Kong Jr. combined.
biased towards females again heh?
From this topic:
http://www.gamefaqs.com/boards/633202-super-smash-bros-wii-u/66332453