Copyright isn't just "did you use my IPs?", Copyright issues can go to "is there a potential to cause a confusion of brands here?" Which Sega could certainly argue well here. There's no problem with competition, but as far as I can tell, Freedom Planet looks exactly like a Sonic game, plays exactly like a Sonic game(This is from watching the trailer, and some gameplay videos), and has furry characters like Sonic., Sega could make some very good arguments.
Pitfall would have a very challenging time arguing for Copyright Issues against Mario as the two games are extremely easy to tell apart, don't really have much in common other than the very generic "2d platformer" tag, and as such don't have the problem of causing confusion amongst the brands.
Now, don't get me wrong, I'm not hoping Sega sues these guys, especially if they made an enjoyable game, I'm just saying I'm surprised Sega hasn't taken any action.
Pitfall would have a very challenging time arguing for Copyright Issues against Mario as the two games are extremely easy to tell apart, don't really have much in common other than the very generic "2d platformer" tag, and as such don't have the problem of causing confusion amongst the brands.
Now, don't get me wrong, I'm not hoping Sega sues these guys, especially if they made an enjoyable game, I'm just saying I'm surprised Sega hasn't taken any action.