I'm in full support of this game's continuation. Unlike other Sonic Mugen "Games", this one actually has effort behind it and a consist sprite style and game engine. I also like how faithful you are to the characters, even down to including some of their SA2 multiplayer attacks!
I look forward to seeing what else you can bring us in the future. ^-^
(Oh, and would it be possible for you to touch up Metal Sonic from your older game, Sonic the Fighters 2? Because I Metal Sonic is one of my favourite classic characters, and his inclusion really does seem like something that'd spice things up. ^w^)
(...And if not include them, then at least make him a hidden character or an extra project afterwards. I understand that the roster is completed but his sprites and base moveset are right there man... Taunting me... So much potential... ;^;)