People are addicted to hype nowadays. I think there's quite a lot of fans out there who prefer talking about shows that don't exist yet, because then they can decide what they'll be, or what they might be, rather than actually seeing what plays out on screen and having to react to it, or be disappointed by it. Maybe that's a little mean, but it's something I feel like I see more and more these days. Part of me even thinks the popularity of Game of Thrones is partially based on the fact there just isn't an ending yet, so people can continue to speculate on what might happen, or what they hope will happen. It feels like there's a lot of anxiety in fandom these days (and a lot of other places), and just being able to imagine what a show will be like gives you a feeling of control over it, and you don't have to have the kind of conversations you have to have when something concrete did happen. Idk. Just my two pennies. I'm sure the people who saw the short genuinely loved it and are excited for a show to happen, but there seems to be a LOT of excitment and tribalism over things that haven't technically happened yet these days. But then, I'm mostly into video games at the moment, where hype is basically a given.