Actually, Dr. Robotnik's Japanese name IS Dr. Eggman. Same with Toadstool. Her "real" Japanese name is, and always was, Peach. So technically, changing their names to Eggman and Peach was MORE accurate. Now on topic....
In the JJ1 manual, it describes a group called the "Galactic Rabbits", who send Jazz to defeat Devan when he captures Eva. I always thought of the Galactic Rabbits as some sort of rabbit space police group, and that's standard attire and weaponry. Maybe Jazz was so different in JJ1 because he was a higher rank or something. Whether I'm right or not, there are basically three possibilities.

1: This is a Mega Man X type spinoff.
2: This is a JJ1 prequel (but unlikely, because JJ1 was assumingly Devan's first Carrotus conquer attempt)
3: This is a JJ2 sequel.

Also, just before I forget, Devan is described as both a "king of tortises" and a "turtle terrorist". Unless, he's a king who's a terrorist. This sorta reminds me of the Mario Sunshine contreversy, except SMS wasn't nearly as drastic in its changes than this. I'll probabaly try this, regardless, but I'm not positive I'll like it. I'dve settled for a JJ1 remake with a higher resolution.