DC has opened up Event Leviathan #2 and Superman's Pal Jimmy Olsen #1 to be partially returnable for retailers, if their orders meet certain thresholds.
For Event Leviathan #2, retailers must match or exceed their orders of Batman Who Laughs #1 (main cover). If they meet that threshhold, up to 50% of their stock in the issue can be returnable for credit.
With Jimmy Olsen #1, orders must match or exceed Action Comics #1006 and any unsold copies can be returned for credit.
In addition, DC has sent out advance review copies of Jimmy Olsen #1 to retailers in advance of their ordering deadline.