I would hopefully say maybe Bragigas added to Raiden, but I dont see anything that resembles him. We cant see the right arm well so maybe just a new arm combo?

Red gets yet another powerboost? DinoThunder much?

It's not really a boost, it's just another Dino for the suit.

Possible. Also possible it's just Black Raiden Kyoryuzin.

However. After digging through some old ass images I camw across the original teaser image for Raiden Kyoryuzin. Which is exactly the same as the one that supposed to tease the new combo here. I think rather than mock up a new image with Tobaspino's silhouette they just reused the original image for the tease. Still a good chance it's Raidern Spinodai Oh.

http://imageshack.us/a/img689/5668/klyo.jpg

http://imageshack.us/a/img607/4972/ogz4.jpg

Holy crap that trailer! The evil Reds. The black-clad Kyoryugers. The Go-Busters (even then I have yet to finish it :p)

This is gonna be AWESOME!