This time it is different, since there is a 7 year gap. I think that because the re-release of Quake 4 doesn't contain the bonus disc anymore, that Quake 2, with the Reckoning and Ground Zero, should be released through xbox live arcade, and with the music fixed, so that the music changes when you exit the map, and enter the next one. I am sure that they could port whatever code that was on the bonus disc into xbla, and use the same code to make the Reckoning and Ground Zero for xbla.
Oh and as a side note, Final Doom and Master levels for Doom II for XBLA too.