I still think explicitly stating the Mayan calendar thing will make it look stale immediately after December 21st.
I suggest tweaking the second para:
And shorten the third:This collection brings together all-new* stories by award-winning authors Hugh Howey, Michael J. Sullivan and Tristis Ward, with fresh, new voices selected by their peers at SFFWorld.com - all brought to you in this first-of-its-kind anthology.
Each story explores a different end of the world. What is the limit of a computer virus?** Can we save the world by stopping time itself, or is every attempt to avert disaster destined to fail?