Yes, it is true. HarperOne will be publishing The C.S. Lewis Bible in October. This hardcover edition will contain the NRSV translation and total around 1600 pages. In addition, this Bible will contain: "Over 600 Scripture-linked devotional readings from Mere Christianity, The Screwtape Letters, and other classics---plus Lewis's letters, poetry, and less-familiar works as well as an introductory essays and presentation page." If you are interested in checking out some sample pages, go here.
While I am grateful to HarperCollins/One for their recent revival of the NRSV in attractive editions, but is this really necessary? This seems to be continuing the trend from HarperOne, with the publication of particular theme oriented Bibles like the Green Bible and Catholic Faith and Family Bible.
Perhaps they will come out with The J.R.R. Tolkien Bible when The Hobbit movie is released? ;)