It's evident Sky feels he's destined, nay, entitled to become the Red Ranger, yet when transforming into a Power Ranger for the first time he clearly shouts "S.P.D. Blue," discovering afterward, to his complete surprise, that he's the Blue Ranger. If becoming the Blue Ranger WAS to be a complete surprise, he should have shouted "S.P.D. Red."
This is the first season of Power Rangers that features a female Red Ranger.