Yuu. Breath!!

Not a bad idea. We all agree the amber stones were made by the museum that developed his gear. To go more in depth, the stones were regular Amber, but the paleontologists put the DNA of 4 different dinosaurs in each one. The omni Amber can contain all 16 DNA. We could go with Yuu's idea for the extinction Amber which was part of the meteorite that killed of the dinosaurs. It could also contain the DNA of the Extinct which give him his corrupt powers.

I dunno, if it's in a meteorite then it kinda implies that the extinct are aliens and not a species from the past. I think him getting the power directly from a specific member of the extinct would definitely work better.

I mean, extinct form IS supposed to be a form closer to the Extinct than dinosaurs.

What if the amber that contained the meteor fragment was mixed with dinosaur and extinct blood....and bones...and preserved organs :D

It was never implied that the Amber was in the meteor during the extinction of dinosaurs. It could've formed inside the meteor after it hit.

Simply, it could just be the DNA of one of the Extinct generals. Perhaps one of the scientists in the Paleo development team wishes to study the DNA of their enemies for the sake of SCIENCE! Ray won't do it for him knowing it could be dangerous, so the scientist either consults one of the secondary Riders to do it for him or makes a nefarious deal with the Exinct somehow.

The thing is, by the time the final form is even in question, one or more secondary riders might be in play here. If the final form is really integral to the story (which I think it should be) it might be beneficial to decide who all the characters involved in the plot at that point are before fleshing out all the specifics.

I think we're all in agreement that the final form should be something close to the extinct themselves in some way. So, we should design the generals, decide what the form does and looks like, then come up with the "hows" and "whys" later when we discuss the actual story events in further detail.

Are you guy's going to be working on the main rider's bike somewhere down the line?

The best I can think of at this moment is that aside from the ridiculous physical strength of the form...it could have the ability to erode things by releasing the energy in its body by roaring , turning them to dust

Probably after the villains.

I like that idea also. The paleontologist can try to use the power of the Extinct for their own purposes and attempts to get rid of the "darkness" inside it and it seems like it works, but when Paleo tries it out, it doesn't work and corrupts him. After we discuss the origin of this extinction form, do you guys want to discuss the design of the generals and boss?