[Den-O]

Thanks to the ever helpful dukemon22 we've just gotten a full synopsis for Zyuden Sentai Kyoryuger! According to the official Toei webpage and dukemons' translations:

-In Ancient Times, the Ankokushuu Deibos (Darkness Species Deibos) landed on Earth. Those who fought against it at the time were the actual Dinosaurs! The Kyoryugers' mentor (Wise God Torin) chose 10 of these dinosaur protectors and crafted mechanical bodies to preserve them in. This confirms that Kyoryuger will features at least 10 individual dino mecha,and only 6 have been revealed so far!

-These mechanical dinosaurs are known as the Zyudenryu! Deibos was defeated by the Zyudenryu and cast into the ocean, frozen in ice.

-In the present, the Deibos are trying to revive the being they were created from, Master Deibos. Their plan involves taking the souls of humans, and offering them up to Deibos.

-To stop the Deibos, Torin selects 5 modern humans as champions. They will be known as Kyou (strong) ryu (dino/dragon) Sha(person), the Kyouryuger! These chosen warriors are pitted against the dinosaur mecha Torin created, the Zyudenryu. If they win their battles they are bonded with their Zyudenryu and become Kyoryugers!

On top of this information AlphaHeroShock has also posted extensive magazine scans of the Kyoryugers! Enjoy!