It's not looking good. I've seen a few polls and Ostrava is close to dead last. How could anyone own a PS3 and not at least attempt Demon's souls? If there is not even a mention of the game in PSA I'll be a little disappointed.
These are the current amount of votes for Demon's Souls characters on my poll (http://community.us.playstation.com/t5/PlayStation-All-Stars-Battle/Ultimate-Character-Poll/td-p/375...
Garl Vinland - 98 votes
Old King Allant - 60 votes
Ostrava of Boletaria - 46 votes
Old King Doran - 33 votes
Solaire of Astora - 91 votes