The Wii U VC currently holds two out of my top twenty games ever (Mega Man 2 and Super Castlevania 4). However, I do also have WWHD which allows me to have three out of twenty on one system, but yeah, the point is, the Wii U VC is good, but not great. I think if N64 titles and GC titles were added, then many of us could play huge amounts of our favourite games on one super convenient device. Perhaps it could even persuade people to buy the system? I mean, games like Mario Kart 64, Resident Evil 4, Paper Mario: The Thousand Year Door, and Pokemon Snap all have big followings and could be the thing to send people who are uncertain about the purchase over the edge!
Maybe we could organize a petition...
(Also, an afterthought: Dreamcast games would be a wonderful addition. I actually bought a DC just for Sonic Adventure and MVC2, so I think Nintendo could make it way more cost effective and easy for people if they stuck some great DC games on the VC, however, this isn't as important as N64 and GC)