While this isn't specifically a pony fair, it runs at the same time as Toy Fair.
I just finished watching a video from My Froggy Stuff on YouTube and they got a few preview items from Play Fair and I believe they will be getting some video stuff done to show off what will be there.
Their preview stuff didn't have much in the way of dolls (which is what their videos are mostly on), however Mattel and Hasbro are both supposed to have toys there so we may get to see something from the two most currently talked about toy companies (hopefully it's ponies and dolls they have). Moose Toys also seems to be on the list so Shopkins anyone
Here is the link to the video
https://www.youtube.com/watch?v=JoXlB55jzFoI do hope we see something pony wise from Hasbro..