Some official Teaser posters…
^ from https://twitter.com/starwars/status/960521139884707841
Solo - Superbowl TV Spot (45s) - https://www.youtube.com/watch?v=9Szts88zY4o
Solo - Official Teaser Trailer (1m 43s) - https://www.youtube.com/watch?v=dNW0B0HsvVs