I'll probably be happy with anything Retro puts out. I own (or owned since I sold my GC Metroid Prime games) every game Retro gas ever put out even the rare Metroid Prime Trilogy and I've been happy with all of them. Given that the team is probably only big enough to work on one game at a time and whatever thy put out next will most likely be their last Wii U effort, I think there will be disappointment amongst fans no matter what. If it's Donkey Kong, fans will have wanted a Metroid game. If it's Metroid, fans will have wanted a new IP. If it's a revival of racing franchises like Diddy Kong Racing Racing (as a recent rumors suggested) or F-Zero, fans will be disappointed that Retro's talents are being wasted on mere racing games.
Whatever they do, I know they'll put 100% effort into it and I'll most likely be happy with it. Personally, I don't see the putting out another DKC game for this generation. Given the low sales of Tropical Freeze, I think they'll wait until the next console generation before releasing a new DK game. By then we'll probably see a port of Tropical Freeze on Nintendo's next handheld system.
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