Easter egg...not really official.
In my own version John and Linda are fighting on the docks with 6 and emile, trying to hold out long enough for both the package and red team to arrive (communication is cut, they do not know that red team will never come). Linda gets injured/dies (like in TFOR, but moved here), emile dies, and noble 6 heroically denies master chief the opportunity to take the mac cannon, since cortana chose him and he's more important.
In a dream world...
[Edited on 05.31.2011 8:23 PM PDT]