I don't know. I mean, if you released it onto the PC, that's okay. But the XBox? And another nitpick: there are way too many Spartans. There's only like, 500 IIRC, max. But with RTS games, it doesn't matter if something has been stated to only have x amount. You can just make as many as you want.
Of course, some more insight into the backstory of the Halo world would be helpful. I did get to this site through a history forum.
Well the Xbox 360 can support a USB keyboard & mouse, so they'll most likely keep that in mind when creating the game. Also, we are talking about a company that has created several RTS games since their founding in '95, so I think they have a fair idea of what works and what doesn't when it comes to controllers for RTS games.