Oh man YES! The really cool thing about the game is how I really did a deep dive into Tatsunoko stuff. Became a pretty big Time Bokan fan out of it. But yeah, it was a lot of fun. I really liked using Roll/Casshan myself. And yes, we NEED another game where Roll isn't some joke of a character. I still have my trading cards too. It was amazing to me that they actually made ENGLISH logos for a lot of the Tatsunoko series. I have no idea if Tatsunoko made them and just has them archived for use or if Capcom themselves made them.
Also, I'm a little sad the Secret File never really surfaced, it seemed like there was some neat exclusive artwork by Ippei Kurei. The only thing that got circulated was that page with Komugi, Phoenix Wright, and Muteking
Although on a recent search, it seems one of the guys from Udon posted a couple pages on Twitter about a year ago