Turns out Pocket Gamer France was right about Sonic Dash releasing on Thursday. Hardlight said on Twitter (before removing the tweets) that the game will be released at midnight for $1.99/£1.49. Unless you live in New Zealand, then the game is already out for you.
Touch Gameplay has recorded some gameplay footage, which can be viewed above. It shows that you’ll be able to unlock Tails, Knuckles and Amy as playable characters and that it is indeed a Temple Run-style game. Though instead of having to tilt the device to move, you swipe with your finger left and right to let Sonic do a quick step. Graphically it looks pretty good, it seems to be using the Sonic Generations models for Sonic and some of the enemies. Also, microtransactions, because that’s a thing you can earn money with on iOS.