Legion Lost Vol. 2: The Culling (The New 52)

Seven heroes from the 31st century have traveled back to the present day. Their mission: Save their future from annihilation. But when the future tech they brought with them fails, they find themselves trapped in a nightmarish world that, for them, is the ultimate struggle to survive!

Rose Wilson and the Ravagers of N.O.W.H.E.R.E. has set their sights on the Legionnaires and intend to rid the world and future of them.  This crossover tale includes appearnces by Superboy and the Teen Titans.

Also in this volume, the Legionnaires must face Metamerican, a new villain, and his army of Metamarines which are bent on eliminating the Legionnaires in the present so they may never protect Earth in the future.

Collects issues #0, 8-16