Stadium was (still is?) booked for 10th and 11th.
Doesn't matter. The two FAs will have to agree the dates, and if they can't, FIFA will set them. And there is no way either the South American side, or FIFA, will accept a three-day turnaround for an intercontinental play-off.
Both intercontinental playoffs last time around were played a week apart, and no reason why that won't be the case again.
10th, Friday night NZT, seems likely.
Any earlier, and players are having a tiny 'turnaround' prior to game one.
Leave clubs Monday, all get to NZ by Wednesday, play Friday, over to SA, play Tuesday.
No. For international qualifying matches, clubs have to release players 4 days prior to the game, and 5 if the game is on a different continent. So there is absolutely no danger of 'tiny' turnaround at the front end.
Like I said, in 2013 both intercontinental playoffs were played a week apart (with both games midweek), and there is absolutely no reason for that not to happen again.
The international window starts on Monday. If they schedule the game or Tuesday, are you saying they'd be missing their games the weekend before, outside the window. (Is this what happened with the Nix in Christchurch in 2013?)
What makes the intercontinental playoff special, that it can't be scheduled like any other window (Friday/Monday, Saturday/Tuesday). Is it just the intercontinentality?
Yeah, there are rules. Teams are allowed to play matches on the territory of only one confederation/continent, and can only arrange friendly matches outside that if they involve no more than 5 hours' flying, and no more than two time zones.
The intercontinental play-offs are the only exception to this rule:
5.
Representative teams shall play the two matches within an international
window on the territory of the same confederation, with the only exception
of inter-continental play-off matches. If at least one of the two matches is a
friendly, they can be played in two different confederations only if the distance
between the venues does not exceed a total of five flight hours, according to
the official schedule of the airline, and two time-zones.