The original idea was that the alt-uni was a community developed universe that was to become a group build. That is why it had it's own forum. The alt-uni was a multi-era thing also. It started in world war II and customs could be made at any time. So WWII, Korea, Vietnam, Cold War, Modern, even the future.
K-Tiger, Cold Slither, Midget, and myself along with sporadic thoughts from others formed the foundation for the universe. Unfortunately no one wanted to join in so it began to look like it was just some special forum for K-tiger and I, which wasn't the case at all. A few others contributed, but not on a regular basis. K-tiger did the majority of the heavy lifting. Ron came in at the end with his epic army of guys.
As i said, i made the alt-uni it's own forum because it was supposed to be community based. If others had their own universe, that they created for themselves and simply wanted to share the labors, i figured they could post up their own uni specific threads. I think every customizer has their own universe, if we had a forum for each universe no one would bother posting in the regular customs forums. At least that is what i thought when i did it.