I can't and won't argue that Snake Eyes
was the star attraction of G.I. Joe back then. However, as I stated before, ninjas just aren't nearly as 'cool' as they were back then (not saying they aren't anymore, just not nearly as strong a pull). Hence, he may or may not be able to draw in the audience and I doubt producers would risk putting all their eggs in a basket and rely on his draw alone.
Another issue with placing Snake Eyes as the star, on a pedestal higher than the others much like in the comics, is that it doesn't suit the genre. As far as I know, G.I. Joe is often thought of as military in which case, the audience not intimately familiar with the comic mythos will expect to see a military themed movie rather than that of the Snake Eyes origin. Of course, this doesn't mean that his story can't be a subplot to a larger plot set in the present. It just shouldn't take the front seat of the
first movie.
I'm not saying hide him. I'm just saying hold back on going all out and focusing on any one character alone for the first movie. If Snake Eyes does turn out to be the fan favorite, then by all means start focusing more on him (though again, not necessarily based on the comics). However, the first movie should be the origins of the G.I. Joe team as a whole, as in how and why they came together, particularly why their sole purpose is to stop Cobra.
You need to. Otherwise, you would lose touch with the audience and the resulting movie will be a flop. In which case, you won't be able to secure the financial backing to further develop the story.
Unfortunately, I disagree. Even the most major franchises generally don't attempt to go beyond two sequels. This occurs due to many factors, from the inability to secure the continued return of the main cast, to producers becoming more interested in newer, fresher products.
*Gasp* You're a fan? I wouldn't have guessed that!

t: Anyway, the thing is, as a hardcore fan, one's view won't be objective. Your interests and wants from a G.I. Joe movie will differ from the expectations of the general viewer who isn't so attached to the brand. Unfortunately, it is these people that the movie must attempt to reel in as G.I. Joe as a franchise has proven unable to support itself from fans alone.