I'm surprised to see nobody has mentioned this interesting bit of news from dvdfile.com, buried in an article about the new TotalHD discs (emphasis mine):
To further buoy support, both HBO and New Line have also committed to the new dual-format disc solution. I seem to recall that Warner handles distribution for New Line and HBO so I'm not at all surprised that they are deferring to Warner concerning format. This is a big deal. New Line had been sitting on some popular films, assessing the HD format war from the sidelines. Among them are such titles as Se7en, The Lord of the Rings trilogy, the Final Destination series, and the Blade series. New Line Home Video President Steve Einhorn was quoted as saying, "We plan to completely support THD specifically. This will move our schedule ahead considerably." He also confirmed that the studio is currently at work preparing the Lord of the Rings trilogy for release in high definition.