Blink, blink. Breathe, breathe. Day in, day out.
There’s a pattern at Epcot and MK, but not AK or HS.There's only one rhyme or reason for the statues and their placement: Marketing.
Don't try to find any other pattern. You won't find it.
If kids point to the statue and cry, "Nemo!" Then Disney has won. Mission accomplished.