Below is the Suzuki G-strider and it was designed as a flashy prototype back in 2003; it was debuted by Suzuki at the prominent Tokyo Motor Show yet it has never gone into mass production. It is one of my favorite bike concept designs because of the futuristic look that it displays. Plus its main controls have several screens embedded into the handle bars and right beneath the shadow of the windshield visor. One of the main themes that a lot of designers strive for when they create sleek motorbikes & motorcycles is to ensure that the two-wheeler looks "fast" even when its parked. And the cool feet-forward design of the G-Strider definitely creates that sort of fast vibe, even when it is viewed from different angles.
And above [in the last two images] we have the G-strider compared to the motorbike utilized by Snake Eyes in the G.I. Joe 2 Retaliation movie [slated for release next year, 2013]. The G.I. Joe bike was actually on display at the 2012 San Diego Comic Con. And you can see that it has some related design themes that link it to something that was featured way back in 2003....
Below you have two monocycles / monowheel motorbikes, and one sci fi hoverbike:
You should check out the former article that shows a host of other futuristic hoverbikes & sci fi motorbikes over HERE!