Other than certain times of the month (New Years, MLK, etc...) January is a good month for availability. Looking at THV availability I can see that the increase in points over a 2 BR in SSR has made a difference and the THV's are more available than previously. I'm thinking that you're going to be successful. We stayed there last year and loved it. Request a unit toward the south end and use the Grandstand buses. That worked awesome as we always got a seat.
It really all depends on your dates though and if you're flexible. Make sure you are online at the 7 month mark when reservations open up.
Good luck. Post your results.