Crash 1-3 and Spyro 1-3 are two of the greatest video game trilogies ever made. PS2 ones weren't that great apart from Twinsanity which I felt breathed new life into the franchise. Then they made those terrible ones where crash had tribal tattoos, fought giant monsters and acted like a baby.
I would love to see another Crash Bandicoot and Spyro game.
Sony were wrong to give them up. If they had kept them both as their IPs they could have been as big as Super Mario imo.