Well, if Marika`s Suit is a recolor of Ryugen, that might mean that if Mai gets a Sengoku Driver and a normal Peach Lockseed she might turn into an Armored Rider version of Marika, and she might also be the first Armored Rider to share the Ryugen´s Sound effects in the Sengoku Driver. Though I will like her driver to be a yellow strap version, because for some reason I really hate the Mass-Production´silver strap. And I think that her driver should also have a Rider Indicator; maybe one similar to Ryugen´s like the similarity between Gaim and Zangetsu´s Rider Indicators.

Now that I think about it... Ryugen so far is the only rider with his own theme for the Sengkou belt. Unless we count the Kiwii lock seed, but there is no Kiwii rider at all.

Summer movie (from 2ch)

Director is Kaneda.
It will be soccer game battle instead of dance battle.
Nakayama Masashi (pro soccer player) will be the guest in the movie.
Fight for the golden forbidden fruit.
Matsumoto Hiroya (Beet Buster) and Karahashi Mitsuru (Snake orphnoch) will be guest extras in the background.

I am pretty sure that the director is preparing something epic for us.
That is why he decided that chinese sound effects to be for most part of the show exclusively to Ryugen

That was decided by Bandai when they designed the toys not the creative staff of the show :)

What if wearing a Sengoku Driver not only let's you use Helheim's fruits for nourishment and power without mutating, but it also builds an immunity toward mutation?

Why did Hase struggle to remain human while Yuya just shifted? I think it's that Hase used his driver enough times that he developed a resistance to the mutagens, but not enough to save him due to his small number of henshins.

So I theorize that someone will eat Helheim's fruit to get all the power of it witout Sengoku Driver dilution and because they've used their Driver frequently enoug, they'll manage to control the mutation to their liking, making them a human/Invess Creature that can harness Overlord levels of power wile keeping their mind intact.

Well when Hase was Invess, Kouta kept being like hey! So maybe Hases mind was like "friend!" So while wearing a driver may help I don't think using it a lot would affect your immunity towards the fruit. Now that theory of yours might apply to the Genesis Driver.

Why do I have a feeling that Takatora is probably going to become an Invess?

...Bonus points if he becomes a Batta Inves :lolol

I want him to be chosen by Helheim and he comes back to life as a bright white Overlord with a hunger for vengeance.