Forces it wasn't really Zavok but a virtual clone of him. At least you fight him and Virtual Metal Sonic, not so much Virtual Chaos or Shadow, who are destroyed in cutscenes (then all four clones are mass-produced, which of course Infinite could do all along)
TSR, he didn't need to appear there, he was supposed to be dead. (OK I admit maybe his giant form could be immune to lava like Bowser)