I've managed to get F-Zero GX to display at the Rift FOV/aspect (or at least close), with stereo 3D. No head tracking yet, but I'm hoping to implement that in the future. This is all using Ocarina codes on a Wii; Dolphin was not used. I don't yet have a Rift, but now I'm definitely looking forward to trying this on one.
F-Zero GX seems to handle the large FOV without any trouble, and not much geometry culling. The stereo separation is configurable; I'm not sure what the recommended value is for the Rift. You may notice that the HUD is gone... that's a result of the projection hack I did (I'll fix it later).
Nintendo Wii console (with Homebrew Channel and NeoGamma)
The Ocarina code which I will release at a later date
Low-latency capture card (I'm using the KWorld USB DVD Maker)
Windows PC with Stereoscopic Player
Here's a quick demo video I recorded. Let me know what you think....