The trailer looks excellent (in the aesthetic sense) but I have two reservations. I'm not sure if Disney can really make this show substantially darker in tone (as this trailer suggests) than other Star Wars things, but I would definitely love a more mature story if they can pull it off. Also, the way Pascal has described his character in interviews makes me wonder how much character development we will actually get in the first season for him. The Mandalorian himself might end up just being a cool gunslinger, but I would hope for some more depth.
Every now and then I still wonder why this isn't a Boba Fett series, but mostly I've put that aside and patiently await the show's release.