GameChanger

We haven't heard from them in a while. Personally I'd like them to come back for ONE map. The working theory right now is based off of the "Round Infinity" step of the easter egg in which players see the N4's corpses laying about, thus leading us to believe they died in buried. 

However, the N4 have died before (die rise) so in actuality, they could have survived buried. Another theory is that the N4 on the RICHTOFEN side of the EE die, but the MAXIS side may have survived the end-of-days brought on by Maxis. 

Actually, my comment wasn't based on round infinity, rather the idea that they didn't survive either endgame

http://Well richtofen was stuck inside of Samuel at the end of richtofen's side. They could have survived that pretty easily.