DKC should work, it shows up on their virtual console games. Nintendo owns the right to the code and their IP, they farmed out the work. A good way to explain how it can go another way, Diddy Kong Racing on Nintendo DS. That one lacks Banjo and his friends as Rare does own those, but they didn't own the game itself. They just had to swap some characters out and otherwise leave it basically intact to sell it. Killer Instinct though, Nintendo published it, but Rare owns that which is why that lame sequel didn't go to Nintendo but stayed with Microsoft, also why it doesn't show up on the virtual console either. Maybe MS would license those things out as it's free money to them and being a closed deck it wouldn't be considered competition.
If this rumor is real, it is really easy to figure out with fairly good assumption if it too had a 30 game line up what to expect. For starters if the same 3rd parties gave them games again that throws Square, Capcom, Konami, Tecmo, and Taito into the mix. Most of what they offered up on the NES CE have SNES sequels, so those are a basic given. The stuff that existed on the NES but not on the SNES, or were SNES firsts but sold highly, those would be your swap outs along with some oddballs.
Stuff like Final Fantasy II (or III), Super Ghouls n Ghosts, Super Castlevania, Mega Man (7 or X likely), Ninja Gaiden Trilogy and Super Tecmo Bowl III, Bust-A Move(in for bubble bobble), Gradius III, Super Contra III would be the likely stuff. Then you'd have the stuff that started there like Final Fight, Demon's Crest maybe, or Sunset Riders.
Beyond that, kind of depends as Nintendo likely would want to have 2/3 of the games theirs again. Super Mario World (if not World+Allstars), DK Country, maybe Super Mario World 2 would be trade outs, but you'd also have Pilotwings, F-Zero, likely Starfox (if they add FX games same with SMW2), Sim City, Super Punchout, Super Mario RPG, Earthbound, Kirby's Dreamland 3 (like SMRPG if they emulate the SA1 chip), Super Mario Kart, and Super Metroid. I'd think games like that would round it out.
