Well considering you can get emblems for pre-ordering (and I think in the LE, not so sure on that though), it’s definitely a possibility, maybe through Waypoint or something? And they could be for other games in the series too, for example; completing ODST on Legendary gets you the Helljumper emblem. It’s definitely a good idea rewarding the players for their dedication to the series.
Meh, I’ve used this through all the halo games, and I don’t intend to change now. So although I don’t care for “super sweet emblems”, I agree that some emblems need to be more exciting.
You can unlock Emblems through progression now. For instance, after you reach max rank, if you specialize a certain way, you unlock an emblem representative of that specialization.