After what happened yesterday, I must say this. There ARE leaks in circulation. They have been for pretty much years at this point. The reason people are gatekeeping it is to protect someone important within SEGA who is advocating for what we want for the series. A lot of these accounts have been vagueposting about this stuff for a very long time now because they can't keep their mouths shut and need attention. As far as I'm aware there are no images, video, or audio attached to this just statements. The main thing is that they're finally ditching the boost formula and going back to something more like Sonic Adventure and the 2D games. Momentum, rolling, spindash, etc. Platforming sections will be better integrated within the main environments. In a way the final horizons update was a test for this as well. There are also misc. details about Sonic Frontiers development and internal discussions at SEGA/Sonic Team. There's really a lot to this but that's the important part.