The Diamond Comics Advance Reorder List is a great speculator tool. It shows what books retailers are going back to get more of, in advance of their release. They are actually putting their money up betting these books get big. These are the books people are talking about in shops, message boards, and websites. Here is the Diamond Comics Advance for 7/4/16:
Wow, never in a million years expected DC to dominate the list like they have been. Rebirth is a hit and each subsequent release is being ordered heavy by retailers. DC has 16 of the 25 top spots. Image has one book taking two slots, Snotgirl. This one debuted in Image+ a few months back. Some reprint Marvels, Spider-man Deadpool, a massive Deadly Hands of Kung Fu, and more Deadpool Mercs rounds out the list.
JUSTICE LEAGUE #1
BATMAN #3
BATGIRL AND THE BIRDS OF PREY REBIRTH #1
JUSTICE LEAGUE #1 VAR ED
SUPERMAN #3
BATMAN #3 VAR ED
HELLBLAZER REBIRTH #1
GREEN ARROW #3
BLACK PANTHER #1 STELFREEZE 3RD PTG VAR
GREEN LANTERNS #3
AQUAMAN #3
BATGIRL AND THE BIRDS OF PREY REBIRTH #1 VAR ED
SUPERMAN #3 VAR ED
GREEN ARROW #3 VAR ED
HELLBLAZER REBIRTH #1 VAR ED
GREEN LANTERNS #3 VAR ED
AQUAMAN #3 VAR ED
MOON KNIGHT #1 SMALLWOOD 3RD PTG VAR
CIVIL WAR II #2 (OF 7) DJURDJEVIC 2ND PTG VAR
SNOTGIRL #1 CVR A HUNG
SNOTGIRL #1 CVR B O`MALLEY
SPIDER-MAN DEADPOOL #7
DEADLY HANDS OF KUNG FU OMNIBUS HC VOL 01 CARDY DM VAR ED
MOON KNIGHT #2 SMALLWOOD 3RD PTG VAR
DEADPOOL AND MERCS FOR MONEY #1