Not super high on the trailer. There's just so much going on that there's nothing to focus on. I'm guessing that more than a few characters whose actors have expiring contracts are dead by the end of the movie. It's all just rolling out more superheroes and expecting a cheer. And it's not just the crown, Thanos feels kinda like a Hulkish brawler here, which is a bit weird.
It's a shame that Marvel doesn't have the rights to Dr. Doom, because I want to see a villain join the team against Thanos (other than Loki) in a "Let's put all of our differences aside while we face the bigger threat and, btw, I might stab you in the back later" role. and Doom would be the perfect fit. He's a legit threat to Thanos with a vast set of powers he could employ. Could be an asset in the planning and leadership roles being more intelligent than even heavy hitters like Stark, Banner, Parker, Pym, and T'Challa already in the MCU and the option for giving him a history where he's experienced in directing battles, and has the ability just to say he'll walk away and protect Latveria. Just bring him in to help out for a bit and introduce a bit more discord into what's already a decently fragmented group who would wonder what the catch is.
Then they could use the newly legitimized and scary Doom to restart the Fantastic Four properly. Only in my dreams.