NBA Jam: On Fire edition will feature Elise, Kaori, and Mac from the new SSX game. It's mostly likely they will be a hidden team waiting to be unlocked. NBA Jam is famous for having various famous people turn up for the game such as Barack Obama, Beastie Boys and even legends like Dennis Rodman and Earvin Magic Johnson.
EA Canada are making both games so this may not come as a surprise to many. This isn't the first time EA charcters have appeared in other titles, Dante's Inferno also featured Dead Space's Isaac Clarke in the game.
NBA Jam: On Fire edition will be hitting XBLA on the 5th of October for 1200 MSP