I noticed the online sale with massive price cuts on jerseys earlier in the week and suspected new kits were on the way. A recent Facebook post to the official Union account seems to confirm it:
To help us get to 92,012 Likes, at which point we'll unveil new primary and secondary kits, the fan who refers the most new Likes wins a full-team signed cleat! Once you get a friend to Like our page, have them leave a comment on this post letting us know you referred them. The fan who refers the most new Likes by 10:00am Thursday wins!