Jim made an interesting comment in the chat the other night implying that he may focus more on the creation of the Aquarium (Freshwater specifically), particularly the background, the bubbles, the sound, and the swimming behavior of the fish, etc. and then have Prolific artists do quite a few of the fish.
The test will be the critical reactions of the fans here to the 5 new fish that Ken, an artist at Prolific has produced for MA2.0.
I don't think Jim is going to let anyone else do that red-tailed black shark though.