all streets open for debate

early in a party poker $50 buy-in MTT.
i had about 1400 chips, villain had about 1500, blinds at 15/30. on the hand right before this, villain made a series of min-raises with the nuts. villain is tight over 30 hands.

Preflop: Hero is MP2 with A[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
3 folds, Hero raises to 90, 1 fold, CO raises to 170, 3 folds, Hero calls.

Flop: A[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/heart.gif[/img] (pot is 385)
Hero bets 200, CO raises to 400, Hero calls.

Turn: 9[img]/images/graemlins/diamond.gif[/img] (pot is 1185)
Hero checks, CO checks.

River: 4[img]/images/graemlins/spade.gif[/img] (pot is 1185)
Hero goes all-in...

i was looking for a call from AK, but in retrospect the action makes me think KK, maybe JJ looking for a showdown which is unlikely to pay off an all-in.

i think all streets are iffy. anyone fold or limp preflop?