This issue is a variant of Aquaman (DC, 2011 series) #52 [Direct Sales]. There exist further variants.
There is an 8 page insert in the middle of the book which includes a 4 page promo for DC Rebirth Batman, Detective Comics, and All-Star Batman, and a 4 page ad for Overwatch video game. The insert appeared in all DC titles released this week.
Series continues in Aquaman: Rebirth (DC, 2016 series) #1.
The variant cover is illustrated by the same art team as the regular cover. This variant cover is a re-drawn version of the cover of issue #1 of this series.