The first thing is that The Wall street Journal have posted there will be four different exclusive minifigures given away, two we know are 'The Collector' from Guardians of the Galaxy and a 'Unikitty' with double sided head.
Their article also mention 20 different 'exclusives' such as life size display models from film franchise films. Another two exclusive sets have been announced to be for sale at the booth for $39.99 - Batmobile and Star Wars Ghost ship. There will be 250 of each available each day.
Yahoo Movies have also posted the picture of the Unikitty minifigure and a The LEGO Movie 'battle pack' looking set said to be released in January 2015.