Re: Was there a seven year plan?
At least with B5 we found out (in one case in great detail) what happen to Babylon One through Four. I can't remember any mention of Deep Space One through Eight.
Why did Starfleet rename it "Deep Space Nine?"
I cannot answer that question but I seem to remember a reference to a "Deep Space Five" in a TNG episode.
One day soon, man is going to be able to harness incredible energies, energies that could ultimately hurl us to other worlds in... some sort of spaceship.