Possibly. The first dates known were from BBTS, who had Prowl for July, Smokescreen for August, and Bluestreak for September.
Now though, Prowl and Smokescreen are later by a month, and Bluestreak is earlier by a month... and BBTS have changed their dates to match.
Looks like Tigertrack has maintained its June release date, so that hasn't changed.