There’s am achievement titled Midnight for the final mission (probably name of the mission). What I think is that the solar facilities on Requiem will be destroyed, and all of Requiem goes dark. What do you think? Sorry if this has already been theorized.
SPOILERZ!!!
All I know right now is the main enemy of halo 4 and it’s size and cortanas abilities.
Spartan Ops being set six months after Halo 4 and seeing a volcanic environment either during early morning or late evening says no.