Star Wars: The Old Republic update unleashes Operation Nightmare
Quick tip to all the trailer makers out there: what starts as an attempt at Eerie Echoey Mystical Man(TM) can, if you're not careful, veer off into 'Why am I reading this out loud in a bathroom?' Exhibit A: the teaser for Star Wars: The Old Republic's Terror From Beyond, now available as a Nightmare Mode Operation in the recently released 2.2 update.
As BioWare previously announced, 2.2 is being split into two parts. Right now, you have access to Terror From Beyond, along with guild bonuses and the new Kell Dragon sub-tier of gear. Later, in 2.2.2, a Nightmare Mode Operation will be made available for Scum and Villainy. Will there then be a 22.214.171.124? No. That would be silly.
You can read about the update's finer details on the SW:TOR Operation Nightmare page.