@hahasamian, this community is so awesome that instead of being silly and saying things to make you feel happy they told you exactly what you need to know, Nintendo, Sega and many other companies go berserk to protect their IP’s you just can’t download those models use them in your game and expect Sega to applaud you, even if it’s a fangame is very risky.
How is that you don’t understand that people don’t want to invest time in something that can be THAT problematic?
You came with copyrighted material, saying that don’t know how to animate the models and that need someone to program the gameplay, in other words you need people to make you everything and you’re surprised because no one is on board?
And after people explained with education the situation you still don’t get it. This advice will protect you too!
There is a game called Freedom Planet which is Sonic but with different assets, why don’t you do something like that but in 3D with you own models?
If what you want is to make an homage you don’t need any copyrighted material, take a look at Rokko Chan, is a Mega Man fan game but with custom sprites, and if 3D is too hard you have Paper2D available!
Good luck anyway man, no one is hating you, you’re taking the comments too badly.