Ok so one of them is Bucky "The Winter Soldier" Cap's best buddy who was frozen in WW2 and woke up with a bionic super-arm. The other one is John Walker (Captain America and The Falcon) who was picked by shady government agency to replace the real Cap until The Falcon stepped up and took the mantel, called US Agent. David Harbour is the Red Guardian, sorta The Black Widow's Dad (ish) who is a Russian super-hero who spied on America. The young lady is Ghost from one of the Ant-Man films who can phase in and out and act moody. The woman in the mask is Taskmaster from the Black Widow film that no one watched, with a new suit. Florence Pugh plays Yelena Belova who is sorta kinda Black Widow's sister who looks to be taking up the Black Widow swing. "Bob" seems to the a character called The Sentry, or at least that is what everyone is predicting. And Julia Louis Dreyfus returns as Contessa Valentina Allegra de Fontaine from that weird Cap America Falcon TV Show.

Whew. Never make me do that again.

I feel the same way. It's been a while since I've felt excited about a Marvel trailer, but between more Red Guardian and the hype around 'dark Superman equivalent' Bob, colour me intrigued