I am going to guess that you won't know the new half or goofy medals (if they are even new) until the expo. I think the marathon medals were the same from the first marathon through 2008 (other then the year on them) and the half was the same from whenever that started until 2009. In 2008 they had the special 15 year anniversary medal for the full but the standard medal for the half and it wasn't released until I think race day. Then in 2009 they switched to the medal they used in 2009 and 2010. There was also a 5th anniversary medal for the Goofy.
This is the first year that the medal design was released so early and had a vote. I imagine that was to peak interest because the registration numbers were down and that is also the reason we have the first ever marathon Monday.
My gut is the half and goofy will be the same as 2009 but that is only a guess.