I would like to talk about the possibility of Noble 6 still being alive and possibly making an appearance in Halo 6. I know I probably sound crazy, but think about it. It MIGHT be possible. Here is why I think my theory is true.
- We never ACTUALLY see Noble 6 die. We just see him almost stabbed - Noble 6 being in Halo 6 could make a whole lot more people want to play Halo, making 343i get a LOT more money - ONI could have easily hidden the truth of Noble 6 being aliveThis is just what I think, but I would like you hear what you think down the comments. Now, my theory is most likely not true. It is interesting to think about though. I mean, I’m sure we have all thought about Noble 6 being alive at least once. Anyways, bye!
There is a long and active topic here and some in other forums discussing Noble 6 being alive / dead. Comments from Bungie staff on the game’s ending state that Six was glassed on Reach and didn’t survive
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> I would like to talk about the possibility of Noble 6 still being alive and possibly making an appearance in Halo 6. I know I probably sound crazy, but think about it. It MIGHT be possible. Here is why I think my theory is true.
>
> - We never ACTUALLY see Noble 6 die. We just see him almost stabbed
> - Noble 6 being in Halo 6 could make a whole lot more people want to play Halo, making 343i get a LOT more money
> - ONI could have easily hidden the truth of Noble 6 being alive
> This is just what I think, but I would like you hear what you think down the comments. Now, my theory is most likely not true. It is interesting to think about though. I mean, I’m sure we have all thought about Noble 6 being alive at least once. Anyways, bye! 
Read page 6 of what stckrboy linked, not sure if it was him of not but a mod linked bungie comfirming his death.