Not to be confused with Zack Syner’s 2009 film adaptation, Damon Lindelof’s HBO take on The Watchmen universe is inspired by the original graphic novel from Alan Moore. According to The Verge:

“This isn’t a direct adaptation of Moore’s 1986 work, which focuses on vigilantes in an alternate United States operating during the Cold War and is widely regarded as one of the most important comic books of all time. Instead, Lindelof’s take is set within the world Moore created, using central Watchmen character Rorschach as a way to springboard into a new era. Superheroes — or costumed vigilantes — are still around in Lindelof’s tale, and it’s clear they aren’t to be trusted. That helps explain why Lindelof’s design includes references to fictional groups based on modern-day organizations like Anonymous. 

They go on to mention that:

“The teaser trailer showcases the differences between what Lindelof wants to do and what Moore achieved. It references characters like The Comedian and Ozymandias, but not necessarily how die-hard fans of the series remember them.”