I went into this thread thinking thematically/narratively. Environmental themes are massively in at the moment, and Sonic is essentially the charismatic leader grassroots uprising against industrialism. The look, feel, and heart of Sonic has been cheapened right along with the quality of the gameplay since the Genesis era. Imagining big, open, sandbox sonic levels with an Odyssey level of polish just makes me wish Sega would double-down on creating something amazing with the franchise.
It's kind of crazy that after all this time, Sega still hasn't really figured out how to make Sonic work in 3D. A number of fan projects have done a decent job of nailing the feel of the controls, and a mixture of open areas with lots of enemies to crash through, and some "channeled" areas that feel more like race tracks than platforming levels could yield some amazing results.
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."