Emperor Blackcross

Emperor Blackcross was the archenemy of the Masked Rangers, the first of the Lost Power Rangers. He makes an appearance in Power Rangers Super Megaforce - The Return of the Lost.

The Return of the Lost
In the beginning of The Return of the Lost, he was resurrected by Vrak using the hatred of defeated villains & forms an alliance with the Brute Space Empire in order to have his revenge on, not just the Masked Rangers, but all the Lost Power Rangers & those who support them.