In Response To: Spoilers might spawn ;) (KiGlow)
That possibly means a babysitting mission.
Babysitting missions SUCK. Bungie barely managed to pull off a decent one in Halo 1 (Honestly, I don't know how many times I've had Keyes kill HIMSELF, not just getting shot). Not to mention, how will the completely odd "you can't really do something and live" moments on Reach work out? You can make a mission of the scene where thousands of Covenant file into the gigantic room, and end up killing the two hunters. And I really don't see that played off as a cutscene either.
The intent of First Strike was always mentioned as "filling the gap" between Halo 1 and Halo 2. Try searching for quotes on that as well.