halo 4 bad guys

as some will know that in halo CEA bungie said it drops hints of halo 4 storyline in the terminals. the terminals have alot to do with moniters not only guilty spark but other moniters from other halo rings. There will probably be some flood but i wonder if sentinals will have a big part and if another moniter will be the evil guy or possibley even a alley. and it or halo 5 or 6 must have chief and cortana escaping the arc! please post your opinion!

Halo 4 = best of reach and 3, halo threach