I was thinking it was really cool having Nathan Fillion, Alan Tudyk, and Adam Baldwin voicing Marines in H3, and the main characters in H3ODST. But they didn’t make an appearance in Reach as far as I could tell, I was wondering will they be voicing any Marines in H4?
343i should just get the firefly crew together for an epic Spartan Ops mission. 
Oh yea, I forgot in Reach Gunnery Sgt. Buck makes an appearance in New Alexandria and they had that ODST Firefight music playing to. That was very short-lived though