I really don't understand why people have such a problem with Retro developing Donkey Kong games. Remember the backlash towards the Tropical Freeze announcement? Remember when people shut up once the game released and they realized how awesome it was? Yet here we are again, people saying they'll be pissed if their next game is a Donkey Kong Country title. And what's funny is that they'll say it's because they have yet to work on their own IP or that they're focusing too much on DKC. And yet they had no problem with Retro developing Metroid games despite it not being a Retro original IP. Not only that, but they've developed FIVE Metroid titles:
Metroid Prime 1-3
Metroid Prime Hunters
Metroid Prime Pinball
Yet no one complains about their work on Metroid. So five Metroid titles is okay, but two or possibly three DK games is too much? It makes no sense.
Personally, I hope their next game is a Donkey Kong title, whether it be DKC or 3D Donkey Kong. Their first two were phenomenal, and Retro is clearly a talented developer and has done outstanding work on DK games. Also, Metroid is great, but I prefer DK any day. Retro's DK games really satisfy my inner platformer fanboy, and believe me, I freaking love platformers.
And if it's not DK, I'll still be excited for whatever Retro cooks up next. They're a great developer with an unbelievable track record. Whatever their next game is, I am confident it will be very high quality.