SO APPARENTLY, Nike went and made this clever little interactive video-thing
on their YouTube page. Various hidden "tunnels" show up during the advert, but one in particular is of note: around 1:55 in, you'll see a brief split-second flash of some new Nike sneaker:
If you click the shoe, it turns all pixellated, and loads up...a Sonic 1-based flash game
called "Sonic X Vapor". The controls are simple: You're constantly moving forward, spacebar lets Sonic jump/doublejump. Get rings, smash badniks, avoid spikes, etc. etc.--of course, you also get to pick up soccer balls to shoot at a line of Crabmeats for a 10-ring bonus. Also, Sonic's sprite was edited so that he's wearing the same shoes like in the picture above.
VERDICT: It kind of plays like a slightly more complex "Sonic the Sketchhog"; simple, yet surprisingly competent. My only disappointment is that SEGA let Nike use the original Green Hill assets, but used the Sonic 4 intro/Splash Hill music in it instead of, oh, maybe the nice riffs from Generations.