Whoever publishes Possum will publish JJ3. And they'll say that in advance, so WTG might still work on it, and then they'd get paid, and JJ3D full would get published. Whoever's stupid smart enough to publish Possum will be smart enough to publish JJ3, because Jazz Jackrabbit already has lots of loyal fans, and Possum doesn't have as much support from it's prequel because it doesn't hae one. Therefore publishers think that Jazz 3D is more stable than Possum.

Or maybe JJ3 is being secretly worked on and nobody's telling us. Hey, it could happen!!