been revealed on the official Star Trek Online website and it's quite lengthy. Several of the new ships are based on one seen in the movies or TV series, including their names. For instance, the Sovereign class -- best known as the Enterprise-E or "That ship in the later Star Trek movies" to everyone else -- is only available to Admirals and has two kingly-named variants known as the Noble and Majestic.
With the entire list of flyable Federation ships known, it's safe to say we'll start hearing more about Klingon ships sometime soon. And with a substantially smaller list of established Klingon ships to pull from the movies and series, we're looking forward to see what Cryptic has up their sleeves.