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 12/13/15:
Looks like it is all about Star Wars, Dark Knight, and Spiderman Deadpool.
DARK KNIGHT III MASTER RACE #3
SPIDER-MAN DEADPOOL #1
OBI-WAN AND ANAKIN #1
BATMAN TEENAGE MUTANT NINJA TURTLES #2
AMAZING SPIDER-MAN #6
DARTH VADER #16
STAR WARS #15
DARTH VADER #15
INVINCIBLE IRON MAN #5
BATMAN HC VOL 08 SUPERHEAVY
BATMAN #48
STAR WARS #14
DEADPOOL #5
DARK KNIGHT III MASTER RACE #3 MCDANIEL VARIANT ED
SPIDER-GWEN #0 RODRIGUEZ 2ND PTG VAR
ROCKET RACCOON AND GROOT #1
DOCTOR STRANGE #4
OLD MAN LOGAN #1
SPIDER-MAN DEADPOOL #1 ACTION FIGURE PHOTO VAR
SPIDER-MAN DEADPOOL #1 JOHNSON HIP HOP VAR
COLOR YOUR OWN DEADPOOL TP
DARK KNIGHT III MASTER RACE #3 COLLECTORS ED
SPIDER-MAN DEADPOOL #1 CHRISTOPHER ACTION FIGURE VAR
GREEN LANTERN BY GEOFF JOHNS OMNIBUS
KLAUS #1 (3RD PTG)