Theory: postcard date, significance

I’m going to sound like a horse conspiracy theorist but hear me out. The pack released just prior to November 2019 was realm of magic which had equestrian clothing that was pointed out in the live stream. We got all excited about that hint/leak but nothing came of it. My theory is that this pack has been in the works longer than usual maybe because of the difficulty of programming horses. It was meant to come out as an earlier EP but development took way longer than expected. But I also desperately want horses in the game (had a dream about it last night lol) so I’m extremely biased.