Maybe have a bonus section in the gallery called "Concept Art" or something? Get folks to see how the CGs evolved from what they were to what they are now? Just a fun, little thing that, of course, has a disclaimer stating that those CGs and associated scenes/events aren't cannon. I think it'd be cool to see; after all, there's been reoccurring continuing interest about them.
Don't get me wrong though, I
do like the game's current art style, and the images created in the fanart thread. All around cool stuff!