That you're probably not familiar with the new writer shouldn't be a surprise. Marvel and Disney have apparently hired Chris McCoy to take on the intergalactic heroes in the only non-sequel of Marvel's next phase.
McCoy doesn't have a produced credit going for him as yet, but Heat Vision points out that three of his scripts have made the Black List, the annual compilation of the finest/most notable unproduced screenplays. His Black List entries consist of Get Back, Good Looking, and Good Kids in 2007, 2009, and 2011, and are reportedly all feature a distinct comedic voice.
He'll be working from a previous draft by Nicole Pederson, whose prior work suggests she has a handle on the science fiction aspects of the story. Pederson worked on Challenger, an unproduced fact-based drama about the 1986 NASA Shuttle disaster, as well as a screenplay that centers around Neil motherfunking Armstrong, the first motherfunking human to walk on the motherfunking moon.
In addition to busting the news of McCoy boarding Guardians of the Galaxy, Heat Vision is also offering a little breakdown of the core team introduced at San Diego Comic-Con last month. There's Drax the Detroyer, "a human resurrected as a green warrior with the sole purpose of killing Thanos," along with the Ent-style sentient tree Groot, "gun-toting half-human/half-alien intergalactic vigilante" Star-Child, Gamora, "the last survivor of her species who was saved by Thanos to be his assassin but now battles him," and, of course, Rocket Raccoon, "a genetically engineered animal with a knack for guns and explosives."
The direct involvement of Thanos in two of those backstories suggests that Guardians of the Galaxy will indeed be the lead-in for Marvel's inevitable The Avengers sequel. Spoiler alert and alls, but Thanos showed up in the mid-credits scene on that film, setting him up as the cosmic bad guy who will doubtless wiled the Infinity Gauntlet against Earth's Mightiest Heroes. Perhaps Thanos will get the Loki treatment, acting as villain in one introductory movie before stepping it up for the next The Avengers movie.
Guardians of the Galaxy is scheduled to arrive in theaters on August 1, 2014.