Seems extremely likely. With a trailer on the 25th I'd bet. Unless there's actually more animals (doubtful but one can dream) in which case they may show this off earlier. I think though that 3 of the 4 packs have had a trailer or animal reveals starting a week or less before the DLC dropped. For some reason it seems like the Arctic DLC was announced more than a week out, but I may be remembering incorrectly.