It could be worse! It could have been Sonic's Final Fantasy or Kazuma cameos in Kingdom Hearts.
This seems like such a bad idea though. SEGA's last 2D fighter was on the Saturn and Square-Enix never even made a 2D fighter, their last fighting game was Ehrgeiz or however it is spelled on the original PlayStation... What a load of shit that was.
Basically, I am not expecting much.