That will be interesting.. If i think of Starcraft 2.. where 40 Developers, 30 Model Actors and 5 Production teams were working for 7 Years... And the Game IS Amazing..
Wish you best of luck.. but i´ve not really Faith into your Skills (you´re really optimistic), as you can beat SC2 or Vanquish or any other Triple-A SciFi Title ^^"
I´m working on a greater Game, too.. But we are now 12 People with different Jobs on the project.. and i calculate with 1-2 Years to finish it..