Eh, Takatora probably had his Sengoku Driver and Melon Lockseed stashed somewhere, so provided that he can get to it, we'll finally see the "true Zangetsu" again

. (see what I did there?)
My one complaint in this episode is, like others have said, the 'fake' Zangetsu drama needs to only stay as long as is effective, and go away soon. Kouta could only be so gullible; if anything, he above all others knew Takatora couldn't have gone down that easily and would absolutely trash him if he didn't go all out. The conclusion should come to him sooner or later. Ah well, I'll just wait for the next episode two weeks from now. That's when the story will kick in again.
I like Kikaider, I like his concept and his !new! designs, and I look forward to the crossover. But really? You couldn't wait until we finished a plot and jumped in on a cliffhanger:redface2:? At least the ToQ crossover had the decency to wait until Kouta got Kachidoki.
And no, I don't think the crossover will have anything to do with the ongoing plot. It's a standalone episode, as far the preview goes. And beside, you can't make a crossover episode story-significant. You can't have a guest character from another show become involved in the narrative.