I have a theory...

Before I get to the main reason for my post, I have good news. Kamen Rider Grease is now on the same side as Kamen Rider Build (meaning he is now a good guy, and no longer an anti-hero)! Speaking of Kamen Rider Build, I have a theory (hence the main reason for this post). In the Kamen Rider Build series, there is this scientist who created the Build driver, and wanted to leave the evil group he was working for. One of the series villains (Kamen Rider Rouge) says that Build is the scientist, with his past memories erased, and identity changed (and even tells a story of how it happened and why). Where as another villain (Known as Blood Stalk) Doesn't talk to Build like he's the scientist in question. So my theory is...that Rouge is lying, in order to try and make Build feel bad about himself, and that the real scientist is waiting for the right moment to reappear (I also have a sub-theory that Blood Stalk is the scientist in disguise). While I have no real evidence to prove my theory, let's face it. Compared to Kamen Rider Rouge, Blood Stalk is Honest Abe (to me at least). Plus, this kind of bombshell (of the Hero also being one of the first villains) doesn't often happen near the beginning of a series. Again, while there is a strong possibility that my theory is wrong, I am only exercising my freedom of speech (also, I wanted to get this out into the open before we get to the point in the series where all the questions are answered).