Didn't all-stars get a spot in the trailers for Wreck it ralph? i think super-bot has been to pretty much every fighting game event in the last six months. TV spots are expensive and i rather sony spend that money on something that directly improves the game.
The real value for the game will be the spot light that each character will get from this game. Also sony will use the data collected from game to see which IPs are popular and ready for a reboot. What if we get a reboot of Medievil franchise?(play him first!) or for rarrapa the rapper?
Sony is not expecting to sale millions, and i am guessing many on this web site arent either. The game is a celebration of the Playstation history and maybe precursor of things to come.