Aces are possible but most players would put another raise in preflop with AA to avoid being OOP in a mulitway pot. The flat call preflop just prices the other two players in.
I agree A9 isn't very likely, but it's not impossible.
How do the draws and the pocket pairs play in this pot?
The pot is huge, half your stack is already is in the middle, you may well be behind, but there's more than enough uncertainty to make the call.
Bottom line is that it is quite close (hence my post) and the second allin has to have something like JJ in his range to make this a call for me and I doubt if he instacalls with this. The cold callers in the hand simply must have trapping hands i.e non premium pairs and suited connectors.
Re the AA play, I can only think he assumed that the players that called his !st raise would fold. Bad play on his part, I would certainly have rrsd a little bit more than the min.
Couple of pokerstoves.
Board:
Dead:
equity win tie pots won pots tied
Hand 0: 10.028% 10.03% 00.00% 10866 0.00 { AA, QQ }
Hand 1: 09.097% 09.10% 00.00% 9858 0.00 { KcKh }
Hand 2: 80.875% 80.87% 00.00% 87636 0.00 { 99, 66, T9s, 97s+ }
Board:
Dead:
equity win tie pots won pots tied
Hand 0: 23.605% 23.61% 00.00% 40926 0.00 { AA, QQ }
Hand 1: 22.443% 22.44% 00.00% 38910 0.00 { KcKh }
Hand 2: 53.952% 53.95% 00.00% 93540 0.00 { JJ, 99, 66, T9s, 97s+ }
So it's a clear fold without JJ and just a call with JJ