For me, it's not that of a surpise if Trek Actors should be in on the ride - Star Trek on its own account had many Anime injokes in it (like a Federation vessel of the name Urusei Yatsura(!) http://en.memory-alpha.org/wiki/SS_Urusei_Yatsura, or the species of the Nausicaans - those are likely not named that for without a good reason! http://en.memory-alpha.org/wiki/Nausicaan
Many people involved in the production of Star Trek were of Japanese or other Asian descent and/or Anime fans themselves (although neither of these need to be the only reason why they did that)
Yeah, I remember seeing pics of him at a convention wearing a Sailor Moon shirt, I really think he is a die hard fan.....just for some reason never talks about it, if I ever meet him in person I will ask.
I actually saw Morbid Angel live a very long time ago. Great show, was actually better than most of the metal bands there. Yeah I have been aware for a long time that Trey has been a fan of Sailormoon.