adapt shinkenger? well my idea is this: shinkens blue, green, pink and yellow just graduated from training are they are now ready to fight the villains. as the villains are attacking, they cannot wait for the fifth member as they leave using 2 ranger cycles (the design is based on ducati) with one sidecar for each.
in the midst of battle, the 4 learned to use their skills and powers. the villains fall back and declared a war against earth (their target: washington DC, the city where the story is set) while the rangers and their mentor are planning another strategy, while waiting for the fifth ranger to join the battle.
meanwhile, an unknown dude is walking toward a city (washington DC) carrying a really big sword with 4 big bags hanging onto it while telling himself that he finally finds civilization, he morphs into shinkenred, excited that his master-level skills will be finally put to the test. "I'm gonna love this." he said. end of episode 1