I completed legendary yesterday, in 4 hours and 52 mins playing time. I was expecting to see MK VI helmet in my armory after completing it but I didn’t see it.
One day later and still not there? Any information on this?
If I were you, I’d check the career completion commendations. I had to replay “Dawn” in order to get the armor.
Same problem but I did it offline, but that shouldn’t even matter. Also still no information from 343i about this issue. Doing it online or offline shouldn’t matter.
Did you guys watch the prologue and final cut scene?
And yeah check your commendations, even tho mine ones didn’t count and i still got the armour 
Just looked at the commendations.
I completed the campiagn, but the commendations on shutdown and composer weren’t counted… sigh 