Ohranger vs Kakuranger questions

I'm having a little difficulty understanding a few things in Ohranger vs Kakuranger. Please answer if you know whether or not the movie addresses any of these questions.

What exactly were the Kakuranger doing there in the first place? Were they there to fight Onbu Obake? Were they even initially aware of the monster's release?

Similarly, did the Kakuranger have prior knowledge of the Ohranger? The movie is presumably the first meeting between the two teams. Additionally, OhYellow was somewhat familiar with the team.

Does the movie address why Sasuke and Tsuruhime arrived earlier than the rest of the team?