As a child of the 80's I have always loved G.I.Joe, but other than the cheaply thrown together game that came along with the first movie adaptation we haven't had a good G.I.Joe game that wasn't cartridge based. That is a mistake and this is my pitch to remedy it.
I think the game should be a collection of missions that somehow tie together a conflict with Cobra and world domination. It can be cartoony or realistic. How about Cobra buys up all the pharmaceutical companies that make Potassium supplements and then destroy all the Banana producing farms in the Western Hemisphere. Now they dominate the market for the best way to keep America from feeling sluggish and having dizzy spells.
Each mission should be large in scale and have a myriad of ways to be solved. On each mission you have a pool of Joes to take with you, each with their own particular set of skills (try saying that without a Liam Neeson voice). I imagine a team set up similar to the classic Jagged Alliance game (pictured below). You pick a team and your resources and attack the mission.
This level design would allow for multiple playthroughs trying to find all the different methods to win and of course completion time challenges and the like. Can you beat the level with only Tunnel Rat and Lifeline? The possibilities could be endless.
Similar to how Call of Duty works in some vehicle missions we could have an air battle led by Gen. Hawk, a Tank battle with Cover Girl, etc. I think several characters could be great NPC's like Dialtone reporting in updates during missions, Doc patching up your surviving troops after missions, Wild Bill flies your team into each mission, and of course Sgt. Slaughter takes you through the tutorial.
I think a third party perspective game maybe with an option for some first person shooting action would be best. Perhaps like Mass Effect where you can switch between your players, and issue commands or fire in a first person perspective. That paired with a art style that is reminiscent of the classic cartoons but still modern enough to look sharp next to current titles would be a hot game.
This game could carve out a very unique place in the current gaming landscape and would benefit from nostalgia loving people like me who grew up with the cartoons and figures. If the game used lasers and wasn't gory it could even be the only game from this genre that could be sold without a "Mature" rating. Instead of another lousy movie I think Hasbro should be making a video game to be loved by a whole new generation, What would sell your Sky Striker faster than having a blast flying one in a game? And selfishly I want to play with G.I.Joes in a more socially acceptable way for a man in his thirties.