There's assurances that there will still be plenty of The One Ring material - as there should be, as that's a special kind of game all on its own - but having Middle-Earth to run around in using the D&D system is a massive bonus, something my D20-centric gaming group will appreciate.
From the Cubicle 7 website:
Cubicle 7 Entertainment and Sophisticated Games have announced plans to make a Dungeons & Dragons® compatible roleplaying series for J R R Tolkien’s legendary fantasy world of Middle-earth, the setting for The Lord of the Rings® and The Hobbit®.
Cubicle 7’s CEO Dominic McDowall said, “We’re all very excited to be building on the success of The One Ring Roleplaying Game and bringing Middle-earth to D&D® players. Uniting two things very close to the hearts of gamers, me included, is very cool – I can't wait for the summer.”
The best selling The One Ring Roleplaying Game will continue as a separate and independent line, with some very exciting announcements coming this week. The new series will be based upon Francesco Nepitello’s highly praised work in The One Ring®, with Francesco acting as creative consultant.
Further details will be released in the coming months, with the release set for Summer 2016.