Interesting times indeed my friends, reading through the lines of all your guesses, I have a little niggle about the Spaniards.
Remember London city was up for sale, one company pulled out from the bidding, I guess the price was getting a little silly - £750m they offered
But I reckon their still looking for an airport to buy so putting 2 and 2 together the Spanish construction group Sacyr Vallehermoso could be a runner.
Either way, I bet the bids are already on the table !!