Uchu Sentai Kyuranger: Lucky's Secret Mission

This story takes place right after the season finale, and Kyurangers vs Lupinrangers vs Patrangers.

Summary:
During a mission on planet Luth, Lucky gets an unknown letter from an unknown person from his home planet, Kaien, in the Shishi System. But what he doesn't know is that it is a trap set by the newly revived Don Armage and Don Arkage. Upon arrival, Lucky gets ambushed by the new Jark Matter members and was 'supposedly' killed.
Back on the Battle Orion Ship, the others receive a distress signal from planet Luth in the Shishi System. It was their old friends, Jiiya and Caesar. They were told that Caesar felt that something wrong happened to Lucky on planet Kaien.
The others, along with Caesar, set course for the Shishi System, and soon arrive on planet Kaien to find the revived Don Armage and Don Arkage. The shocking news of Lucky's 'death' sent the others on an emotional roller coaster.
A few years later, the team is struggling to fight against the newly created Jark Matter organization on Kaien. They are pushed into a corner, but they are saved by a mysterious figure in black and red. The figure seemed to have a familiar feeling to them, but the figure didn't stay long for them to find out their identity.
The Kyurangers and Jark Matter are determined to uncover this mysterious person's identity, and see if they are friend or foe.