- last post: 01.01.0001 12:00 AM PDT
this theory is very plausible but I think it would be a mistake to simply go into marathon.
first off, there is alot of unfinished business in the halo universe, like the sparten IIs and IIIs in the micro-dyson sphere. even if onyx is destroyed the slipspace bubble would have protected him; so leaving this many loose ends would ruin the story. its good story telling to leave alittle mystery but not that much
second, the portal on the ark and on earth would likly be a very large very advanced slipspace hole so if it collapsed the arbitor would be the more likely to be sent to another universe, not john, he would simply be left behind.
finally don't mistake the large number of marathon refrences to evidence. Its likely that bungie wanted a huge marathon refrence for the finally for the hardcore marathon fans, since the game did change alot since combat evolved. remeber that marathon was bungies most succsessfull game since halo.