Maybe the 'guests' stopped visiting cause of us knowing they're here?
New form for King K.Rool? I don't know. Maybe more fighter orientated? Though 'King Krusha Rool' from DK64 would be plenty enough answer to that. I hope they come up with something creative. Depends on Nintendo's actual plans with the character / franchise I'd guess?
To all guests: I wouldn't even care if K.Rool didn't got into Smash, as long as K.Rool, the Kremlings, more animal buddies and more familiar old Kongs would return to the franchise. Returns was a real good game, but like Jungle Beat, it went too much in it's own direction. And we, the Donkey Kong Country fans firmly believe that staying with the actual true roots of the game would be best for the franchise. The characters in DKC are just as important to fans as Mario, Zelda, Metroid and Kirby, just to name a few. Yet these franchises didn't really stray as much from the core as Donkey Kong did.
Hence why I personally appriciated PAON's efforts with the characters so much in their games. Jungle Climber to me felt far more true to the DKC-envoirmental experience than Jungle Beat, and even DKC:Returns. While I don't think Jungle Beat and Returns are bad games in their own right, both the developers tried to mark their stamp on the series too much. I think that's mainly due to unfamilarity with the series. If Nintendo EAD, Retro and PAON could all develop one true Donkey Kong Country togheter, with platform elements as DKC:Returns, usage of the Rare-made content as enemies, helper Kongs and animal buddies (characters in general) as in Jungle Beat and DK:Barrel Blast, and the deep envoirments and battle styles of Jungle Beat you'd create one big master piece that'd surely sell as good as a Mario or Zelda title. And if you must, throw in Arcade styled levels as well. Please make Donkey Kong Country RETURN propper. That's all I'd want to see.
Greetings, a longtime fan.