.@Tracker_TD is PR2017 made from the same thread of Generations?
No, they are different. PR2017 is similarly planned to include classic 2D

— PushDustIn (@PushDustIn) October 28, 2016

While we know a lot about Sonic Mania, we know little about Sonic Project 2017 outside the released teaser video from July. But information about the project recently released and a major part of this information was the gameplay style.

It will be modeled after Sonic Generations, mixing Classic Sonic (2D Gameplay) and Modern Sonic (3D Gameplay) with unique levels for both. Also part of this bit of information is that a new ‘element’ is being added to the gameplay styles, so maybe we will see new moves for the Sonic’s for example.

Source: Sonic Wind Blue