data-mm-id=”_vcbhrr9op”>House of the Dragon, the Game of Thrones prequel series, premiers this Sunday on HBO. In addition, there are multiple other Game of Thrones-related properties rumored to be in various stages of development. Let's look back at where they were in April 2021 and today, 16 months later. April 2021: The official Twitter account of HBO's Game of Thrones has remained active since the series finale two years ago. On Wednesday they simply tweeted, "Winter is coming," the words of House Stark. It was also the name of the very first episode of the series. Considering it's April, it likely has more to do with the Game of Thrones seasons than the changing seasons. So some people got excited thinking HBO was going to remake the disastrous final season…