A lawsuit filed by NCsoft against Bluehole Studio seeks to prevent the planned launch of TERA, Bluehole's upcoming MMORPG, reports MMO Culture (thanks Rock, Paper, Shotgun). There's a post on the TERA Forums saying "It's our policy not to comment on legal matters," and here's word on the lawsuit explaining that NCsoft is alleging theft of trade secrets:

The current lawsuit claims that the U.S. version of Tera makes use of NCsoft's trade secrets, including documents, source code, artwork and know-how related to the development on Lineage 3, and copyrighted works, including concept art created for Lineage 3.

It also asserts claims of breach of confidence, unfair competition and unjust enrichment.

The suit seeks temporary and permanent injunctions blocking the release of Tera in the U.S., as well as enhanced damages for Bluehole's alleged misconduct.