Crash's (apparent) success certainly makes a Spyro remaster more likely than it would have been a few weeks ago. But, Spyro was never anywhere close to the level of Crash's significance.
I don't know how much Activision spent on the Crash trilogy. If these enhanced remasters (for lack of a better term) are cheap, and they see easy money in Spyro, then it will be made. Otherwise, I think it is unlikely.