I believe the idea of AAA indie has much merit within the industry. However aside from the questions and the occasional art piece released in-between the chunks of gameplay and demos... more needs to be done to attract attention and resources (financing) for the completion of this title.
Why not get the community even more involved through competitions such as design a bad guy, a gun,etc... etc... Banner competition is a good start.
Delve more into the backstory of the Universe you are creating, reveal to players the depth of your creations. Inverse, allow the community to add to the lore.
Update your blog daily! Even if its to say you are working on the game.
Make the Briefing Room worthwhile! Maybe a daily video blog? More in depth look at what's coming in future updates? Exclusive Polls and or Surveys? Weekly or Bi-Weekly web comic? The Investor reports are nice.
Merchandising... It can be considered cheap, but only if what's available is.
Get your game and names on the big sites; IGN, Gamespot, Joystick, Kotaku, Destructoid, etc... etc... I realize that this has been done in small portions, but maybe do an exclusive weekly blog post, video blog, and interviews. You need to get everyone thinking about this game! Daily! Weekly! Monthly!
You have to start planing to contend with upcoming titles from the big guys: Like Activision's Future Setting COD game that keeps getting rumored, and whatever Bungie is cooking up for them. EA's potential "First Person" SciFi setting game being developed by Bioware (The one to be previewed at this years VGA's). Also Microsoft will most likely move the Halo series towards the route taken with the COD franchise. As well as the other Publishing houses and Pro Studios. If they begin to feel threatened by your work, you can bet they will try to squash your studio and your proposed Video Game design strategies.
Your best bet to preserve your financial security and relevance in this industry is too attract attention from all potential consumers, and solidify it. If you gain the consumers loyalty and trust they will make you successful, otherwise this game doesn't get off the ground as it should. Also being highly active in the Video Gaming community will probably help gain support for bigger investors who are still unsure of your strategies.
Good Luck, and godspeed!