There is a game called Sonic Jump, and it will be released on mobile platforms soon. That’s pretty much all the info Sega released about this new project today, along with this image, illustrating what it looks like when Sonic jumps.
We’ll have more detail when there is any.
Update: As it happens, Sonic Jump was the name of a game developed by Sega Mobile for the T-Mobile Sidekick, way back in 2007. Players guided an automatically jumping Sonic through vertical stages in an attempt to nab a Chaos Emerald before Dr. Eggman had the opportunity. Here’s hoping this new Sonic Jump is the rebirth of the franchise, rather than a port of the original.