Sonic Rush is good, though.
But I still highly doubt Espio of all characters is gonna be in the film. Keep in mind the fact that this is still a Hollywood adaptation made to cash in on the brand and not a film with a deep knowledge of the source material. It's also aiming to draw in new fans to the Sonic franchise.
General audiences don't have any kind of inkling who Espio is. I bet most general audiences don't even really care about Tails. They know Sonic, they know Eggman, and they know FAST.