The top left corner of the "video feed" in the trailer has an IP address (23.253.120.81) that rolls over to nybulletin.com which emulates a New York newspaper and has video interviews of characters in the Defenders.
When Luke (Mike Colter) gets off the bus, the advertisement on the side is for the New Harlem Renaissance. This is the socio-economic reform initiative championed by Mariah Dillard (Alfre Woodard) in season one of Luke Cage (2016).