Call for sure
There is no way i will fold AA with a shove from SB even though he is chip leader. Situation here is as you are at the bottom he range you, and think about your move like you are trying to steal the blinds. First you didn't 3-bet cause no once raise before you just raise. And as you are at BTN your range could be AT, 99, TT, so on. This guy may be on JJ, QQ, AQ, AK and if he has KK AA he would have re-raise trying to take the most EV of his hand. Men you have the best hand preflop, just one player, the chip leader and you are about to take all his chips. Call will be always the best, you will win 4 of 5 times. If luck it is not in you side thats ok. you don't want to win a third or fourth place. you want to be 1th and with all those chips on your side you can at least be 2nd.