The Legion of Super-Heroes #23 finales seems a bit important for things to come in the DC Comics New 52.
Below are SPOILERS from August 2013′s LOSH #23 and year one and year two issues of Legion Lost, #10 and its finale in #16.
You probably already know the Legion of Super-Heroes was cancelled and the speculation about what some panels from its conclusion could signify or even undo.
The book sees the Legion of Super-Heroes asked (ordered?) to disband.
At this point we can speculate that it could be a multiverse crisis similar to the Crisis series from pre-New 52. As you can see that there are 4 Mr. Terrific being display in the image from different universes and they might not be all good as Grifter is shooting at one of them. There is also a robin which can be from the past, present, or an entirely different universe. Looks like Lois will play a role in the event. It might be something similar to the one she played during Flash Point. Booster Gold is also in the image and he played a prominent role in the Dc Comic weekly 52 that led to Infinite Crisis . All signs point to a showdown of infinite Earth (Well 52 of them at least). There are other things to point out such as Superman, Hawkman, and the ship in the background but there is not enough information to work off. Sound off in the comments if you spot more hints to Futures End.