Maybe it was made before Jak and Cole were revealed and maybe before they were made so they jsut used concept art? Thats why Heihachi and Toro are on there.
Its fake people, why wouldnt the stages be mashed toghther, and most importantly where did he get his sources from.
I doubt these are the rest of the characters, and even if they are, I'm calling shenangians for the fact that none of them are 3rd party characters. I'm pretty sure they'd have to add in at least one more... why's Big Daddy so special...