For a while, Team Sea3on are making a serious effort to continue the story of Sonic SatAM via a pilot episode. Unfortunately, hand-drawn cartoons are exceptionally expensive to produce, and the quotes from studios are currently outside of their budget.
I persronally would love to see their efforts come to fruition (at least Sega, DIC and Ken Panders haven't shut them down yet), although my donation is just a drop in the ocean. One can hope though.