Go-Onger: Jum-bowhale so fast?

In Episode 19 of Go-Onger, Jum-bowhale, the ninth Engine was quickly introduced, not formerly, at the end of the episode. The Sixth and Seventh rangers had been revealed in episode 17, I think it is rather quick from the 9th mecha to already appear. But of course, this one will help make up the robot for the two new Rangers--Seiku-Oh. It seems to be a pattern to have mecha built of three mecha in this series. The main three make EngineOh and the black and green ranger's Engine combine with the sixth Engine to make GunBirOh. And, of course the combination of all nine Engines will also be in the movie, premiering August 9th.

I guess these characters were revealed quick enough so they could appear in the movie. Because last year in Gekiranger, the fourth and fifth rangers were not revealed until after the movie premiered August 4. GekiViolet premiered in August 19 and the last Ranger GekiChopper premiered on September 9. Also, Gekiranger only had 13 mecha. Go-Onger appears to will have more, probably 15. Of course 3 are re-paints, the 'evil' mecha above--DaiShogun, which will appear in the movie as well. Of course, this whole thing about what and who appeared in which episode can't be determined, as Gekiranger is evidence--nothing goes in accordance, characters and mech can be introduced at any time. But there is such a thing as timing and character development, so having 7 rangers by episode 17 compared to having only 5 (and 2 evil sort-of rangers) by episode 28 is pretty smart.