Old Mars est une anthologie co-dirigée par George R. R. Martin et Gardner Dozois. 
Peu d'infos pour le moment... à part la table des matières. 

OLD MARS is a new anthology of science fiction and fantasy stories about Old Mars (not the real post-Mariner Mars, but the one we all loved as kids, with the canals and the dead cities and the various flavors of Martian). 
The anthology will feature fifteen original, never-before-published short stories and novelettes, story notes and author intros by Gardner Dozois, and an introduction by George R.R. Martin. 

Sommaire : 
"Martian Blood” by Allen M. Steele 
“The Ugly Duckling” by Matthew Hughes 
“The Wreck Of The Mars Adventure” by David D. Levine 
“Swords Of Zar-tu-kan” by S.M. Stirling 
“Shoals” by Mary Rosenblum 
“In The Tombs Of The Martian Kings” by Mike Resnick 
“Out Of Scarlight” by Liz Williams 
“The Dead Sea-bottom Scrolls” by Howard Waldrop 
“A Man Without Honor” by James S.A. Corey 
“Written In Dust” by Melinda Snodgrass 
“The Lost Canal” by Michael Moorcock 
“The Sunstone” by Phyllis Eisenstein 
“King Of The Cheap Romance” by Joe R. Lansdale 
“Mariner” by Chris Roberson 
“The Queen Of Night’s Aria” by Ian Mcdonald 

(Source : SF Signal)