You wait ages for a trailer then two come along at the same time. The first trailer was released during the Superbowl where the Philadelphia Eagles took on the New England Patriots. If you're interested, the Eagles won for the first time and it was a shock as many expected the Patriots to win. Back to Star Wars. During the half time, a number of trailers were released, some sci-fi such as Solo - A star Wars Story and others such as Mission Impossible : Fallout.
We got to see a minute snippet of the film where we got to see Han Solo, Chewbacca and Lando Calrissian. We also saw Thandie Newton's character but we aren't sure of her role and character name at the time of writing. New characters were Tobias Beckett who is Han's mentor and business contact. It is Tobias that first hires and gives Han a job.
We see that the main female lead is Qi'ra pronounced Kira played by Emelia Clarke. In the trailer, we do see the Millennium Falcon and how pristine it looks compared to how it looked in other films. Although we see the Imperial Navy and a Star Destroyer chasing the heroes, its unlikely we'll see Darth Vader like we did in Rogue one.
A theory on the film is that Han fails the Imperial Navy examination, gets kicked out. Han meets with Chewbacca and they go off adventuring together. Along the way, they meet Tobias and Qi'ra who offer a job which involves the Kessel Run which he completes in 12 Parsecs presumably being chased by the Star Destroyer. A Parsec is 3.26 light years and not time.