I do not know if this rumour was proved true or false, but you may remember a while ago, Bungie had hired (the name escapes me now) the Lead designer for either GRAW or Rainbow Six. We can also see that, from the silhouettes, that each person obviously represents a different class of Spartan, ranging from Heavy Weapons (left) to Marksman (right) and so, I believe that with Halo Reach, it will be a Tactical Squad Based Shooter, similar to GRAW or rainbow six. Does anybody else agree?