Points 1-3 The "Dev Team" left years ago, most of the guys who didn't help on MidAir have all but vanished. There probably won't be a new set of developers working on legions because its 12 years old and extremely dated.
Points 4-6 Do that yourself, You don't need permission from anyone to promote the game or make BoomerBook pages for it. At the same time don't expect anyone here to take up something you can easily do yourself.
Point 7 There are very few people if any even playing the game, No people no point. Again you're welcome to do this yourself.
Point 8 Ok, do it.
Point 9 Cool, have fun.
Setting up a server is pretty straight forward, theres even a guide in the help forums.
Anyhow friend i wish you nothing but luck in reviving legions, godspeed you king.