Nothing official yet - but I am guessing this will be released ala Charlie Angels style - sometime near May 2004 when the next Spider-Man movie arrives. I look forward to this and will be selling my current version soon.
I'll trade in my current 2-disc version for the Superbit whenever it comes out because the extras on the 2-disc pretty much suck anyway. I just want better video and a DTS track for this movie. We'll probably see the SB in April '04 right before Spider-Man 2 hits theaters and I'm sure they'll do the free movie ticket offer just like they did with Charlie's Angels and Bad Boys.