The lastest Previews listed Dynamic Forces to offer:

Justice Leagues Signed #1
Signed by cover artist George Perez!

A mysterious being from the other side of the galaxy dispatches the Advance Man to prepare Earth for his client's arrival, adapting the climiate, plants and all wildlife in the process - a move that could kill millions! when the JLA confronts its new foe, the Avance Man delivers his master stroke: making the seven "core members" and the rest of the world forget there ever was a Justice League of America! Limited to only 1,500 signed copies! $19.99.

SPOT NOV002054 JUSTICE LEAGUES #1 SGN (C: 2) $19.99 = $