We'll see. That scene could very well happen at the climax of the next book (more of Jordan twisting things around, the Arthurian Cyle ending there), after some mega Arthurian armaggedon at Caemlyn (Camlann, Camelot). We know the characters are set for a reunion at the "event" which starts the LB proper. It could well be heading for something like this, as there's nothing much Arthurian in what we can puzzle out for the LB -sealing of the Bore, the Horn sounded etc. That is inspired by other sources altogether, and it may be that Jordan planned to "wrap" the Arthurian stuff in Caemlyn as TG starts. Rand's epiphany in TGS was "surprising", in the sense it comes very early in the finale. It could well be that the Light is heading for a major road bump soon after (timeline-wise, so at the end of TOM), and that "new Rand" will be "dead" and out of commission for a while (ie: healing), to return to the world in the nick of things further down the line, for the finale of the Last Battle, or to begin to turn the tide midway into it.