what happened to MC since he didnt die at the end of halo 3?

[Dfjkl]

what does it mean since MC is still alive and flies off into space. Bungie said that it was the end of the trilogy, what happened to MC?
MC= Master Chief

 

[Tanner]

I believe he freezes himself, and tells the holographic chick "Wake me up when you need me." so that's basically what happens.

 

[.......]

if you hae completed the game on legendery and watched the special cutscene, his ship is orbiting to a planet known as onyx that is full of setinalls(whihc are the floaty things that follow the monitor) im talking like trillions of them. by the way onyx is a forerunner constructed planet

 

[brdevane]

He got cryo chambered, (frozen) to be woken up by cortana when there is another BAD war, thats how he came about in halo 1