Assuming this isn't bull or doesn't get changed upon release, it sounds like it'll be a lot of fun.
Nice to know Robotnik is still alive and they're moving away from the human couple drama (hopefully they make Robotnik more eggish this time or have him be played by Mike Myers or someone similarly round if Carrey decides to not reprise the role). Also nice to know my boys Big and Metal are getting some love. I also like the little nods to past obscure media these movies keep making. The second movie even put more emphasis on owls, and Tyson Hesse even connected them to that whole Sky Babylon shit from Sonic Riders.
And are these mini-emeralds some kind of reference to those weird early Sonic comics where there were like thousands of mini chaos emeralds everywhere instead of only seven?
Goofy shit but a nice touch. It shows that these movies haven't been superficial in their references and connections and were made with fans in mind (not the gross bbq furry ones) unlike other attempts at adapting or continuing pre-2000s IPs these days.