25 NL- RR all-in @ river - was ist sein range?

[Fishkutter]

PokerStars No-Limit Hold'em, $0.25 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($36.95)
BB ($14.65)
UTG ($25)
MP1 ($26.30)
MP2 ($49.55)
Hero ($25.75)
Button ($42.65)

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, MP2 calls $0.25, <font color="#CC3333">Hero raises to $1</font>, Button calls $1, <font color="#666666">2 folds</font>, MP2 calls $0.75.

Flop: ($3.35) 9[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
MP2 checks, <font color="#CC3333">Hero bets $2.75</font>, Button calls $2.75, MP2 calls $2.75.

Turn: ($11.60) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
MP2 checks, Hero checks, Button checks.

River: ($11.60) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
MP2 checks, <font color="#CC3333">Hero bets $5</font>, <font color="#CC3333">Button raises to $22.75</font>, MP2 folds,

hero ? mittlerweile halte ich den nutflush. sicher, das board ist gepaired. auto-fold?

was kann er haben? er callt mein pre-raise. AK? some do. 99 ist plausibel. ein schlechterer flush? ne 6?