Have you looked into the work of Anne Geddes - Having an idea of the work she produces might be an indicator of the type of work that might win. If she is a landscape photographer she is more likely to have an interest in the landscapes that are entered than say the portraits
Her fame is actually centered around newborn pictures. I unfortunately don't have any of those.
Family life - more likely happy - outdoors I would say - not the gleaming white smiling - tooth paste type images - but almost - activity shots - the type you might see of Barack Obama and his family. - her way of dressing would suggests she is not often in gritty areas such as ghettos.
Landscapes possibly - in order not to look predictable - Street Photography not likely, She is likely to like a big sky - Texas could be in the running,
She likes her comfort - I would guess snow and ice are out of the betting,
Though snow and ice viewed from a luxury cabin with a roaring log fire I guess has its charm.
She lives in New Zealand so Wikipedia claim, so she is possibly a little more hardy than her bone structure would indicate.
She once lived in Hong Kong so big cities have a chance - what big city in America looks the most romantic? I think the winner will be American - if big cities are in the running I would say possibly the waterways of Chicago. But Paris is good outside bet,
Who are the people most likely to be in the photographs?
I am sure you can guess,
From those rough ideas do a search in FAA of Paris, Chicago and Texas and then go though photographers until you find those of a big agency - such as National Geographic - study their work - but among them I do not think there will be a winner but someone else producing work in a similar style.
Sports and outdoor activities - out
Hunting and fishing - out
Pets - out
Flowers and plants - not in a month of Sundays
Babies? - Not Likely
Ships and boats - out
Cars, trains and aeroplanes - out
Wildlife - out
But entry is free
And so enter your Teddy Bear and just wait and see