What are your hopes in the next major installment to the Sonic games?
My personal hopes is that if Sega cannot use the same gameplay from Sonic Unleashed-Generations, then they shouldn't bother with Sonic Lost World gameplay and take some pages from the Dreamcast era. Yes some may argue that Sonic Adventure games had not aged well and I agree Sonic '06 was abhorent, but I believe that with simple gameplay like Adventure had and maybe a bit of boost from the modern, it could really flesh out a gameplay that would appeal to btoh modern and classic Sonic fans. Plus such simple gameplay should be easy for Sonic Team to do and can concentrate on environments and story.
At least that is what I wish for for the next Sonic game.