It's good to see you have a team, and that you are planning out what you are going to do.
However, I must give voice to a warning, borne from years of researching and archiving great dead mods & conversions. And that is this; models are nice, models are cool. Models are the eyecandy that both attract user interest & keep
you interested as well. However, if you don't start with/put a greater emphasis on actually
creating the mod; the actual modification of information in the World Editor (i.e. Step 3, 2 & 4 it sounds like; the techtrees, the triggers, and the environment)... Somewhere to actually
put all those beautiful models... Well, let's just say it will not end up well for you all. One need look no further than
my signature or Kam's
Mod Compendium to know that I have seen too many wonderful and ambitious Total Conversions fail by doing nearly the same thing; focusing too greatly on models and such. There
must be some work done for it to stand on.
Just my two cents. As always I wish you luck on your endeavors. : )