Grego, congratulations for all of these new features!
But, in function to so many good things, I'd like to suggest the following: what about to create two versions of this homage to Final Fight? What I mean is: I believe we have two different types of people following your work (some that want the game as the classic arcade - with only the 3 players support and some that want new possibilities with it).
Under these conditions, let's suppose a version named:
Final Fight Classic - 3 players
Intro with Jessica;
Life bar for 3 players (similar to Cadillacs and Dinosaurs)
3 players support (but without the possibility to use the same characters);
Keep the original aspect of the game, without new colors for the characters;
Belger's fall - background darker to match with the last stage;
Bug fix-> Attack Scream - when jumping from the subway to Sodom's ring, all the three characters use the same voice (Guy's scream) - to use the attack scream of each character;
This version should be more attractive to the lovers of the original game (I'm one of them)
But I respect and I see it's necessary to improve the game, with several new possibilities as you've been presenting to us. Under these conditions, let's suppose a version named:
Final Fight 30th Anniversary Edition;
Intro with Jessica or, if it's possible, the Sega CD ones (it's awesome);
3 players support (using the same characters, different characters, etc);
Possibility to change the characters' colors;
Possibility to Haggar apply the Pile Driver on Guy and Cody (I'd love to do that);
Guy, Haggar and Cody using the knife without losing it (a special command to throw it: "UP+punch"
I believe that Final Fight Apocalypse 2nd Edition (OpenBOR mod) would be a good inspiration for you to create many more things in your homage to this marvelous game.
But please, don't get me wrong, this is just a suggestion.
Congrats, once again, for all of your effort... and thank you! I'm very anxious to see this release.