George R.R. Martin has this to say on his livejournal:
The Venus of Leigh Brackett, Edgar Rice Burroughs, Roger Zelazny, C.L. Moore, and Isaac Asimov.
Those who miss the place (like me) will be able to return there next spring. OLD VENUS, an original anthology of retro-SF stories set upon the lost Venus of old, will be released by Bantam Spectra in hardcover on March 3, 2015. We just got our first look at the cover:
My story PALE BLUE MEMORIES will be in this. Very excited.