My perspective is the number of incentive covers being offered indicates there is a significant number of people either collecting the variants or potentially speculating on those variants going up in price. Collecting variants because you like the cover is fine. Speculation on the value of incentive variants, however, has some dangers attached to it.
The 1990s had a similar gimmick cover period and when that speculator market dried up, sales dropped and numerous stores closed. As long as all involved parties are aware of the risks of catering to a speculator market and act responsibly, there isn't a problem. Even if that isn't the case, if the speculator market declines in a slow enough manner, things could work out okay.
The new titles category added 1,951,196 units compared to last month.
Venom #1 launched high with 225,782 units. The issue had a 1-in-25 incentive cover, a 1-in-50 incentive cover, a 1-in-100 incentive cover, a 1-in-500 incentive cover, a 1-in-100 incentive cover and two meet-or-exceed 200% of Amazing Spider-Man/Venom Inc Omega #1 incentive cover.
Avengers #1 launched strong with 131,450 estimated units. The issue had a 1-in-50 incentive cover, a 1-in-100 incentive cover, two meet-or-exceed 250% of Avengers #676 incentive covers and two meet-or-exceed 300% of Avengers #676 incentive covers.
Avengers #2, on the other hand, only had a 1-in-25 incentive cover and a 1-in-100 incentive cover and sold around 66,646 units, a drop of 49.3%.
Black Panther #1 launched strong with 22,358 estimated units. The issue had a 1-in-10 incentive cover, a 1-in-25 incentive cover, a 1-in-50 incentive cover, a 1-in-100 incentive cover, a 1-in-500 incentive cover, a 1-in-1,000 incentive cover and three meet-or-exceed 200% of Black Panther #172 incentive covers.
Expect a sharp drop on Black Panther #2 which only had a 1-in-25 incentive cover.
Justice League: No Justice was a repositioning miniseries for the Justice League, similar to how the No Surrender storyline for the Avengers ended one era of the team and set up the transition to the next era. Justice League: No Justice #1 sold 86,775 units and the weekly series lost sales from there with the final issue selling around 64,342 units.
Man of Steel #1 had reported sales of 78,942 units but the issue was returnable and the reported quanity were reduced to reflect possible returns.
Barrier was a digital comic by PanelSyndicate.com which was printed in as a weekly miniseries. The attrition in sales on the title wasn't too bad and could reflect people being able to check out the digital version for free before buying the print version. The "name your price" approach at PanelSyndicate.com seems to be working for them.
The returning titles category added 392,340 units compared to last month. Doomsday Clock account for roughly have the units in this category.
Calexit which launched in August 2017 has had some delays. The solicit for the trade indicated it would include previously the unpublished material from the final two issues of the miniseries implying those issues would not be released as issues. Those two issues have not been listed as canceled by Diamond. Depending if those two issues end up being published or if the series is aborted to trade, this might actually be a defunct title. These are the sorts of things which drive readers to skip the issues and go straight to the trade paperback.
The suspended titles category removed 955,609 units compared to last month.
Action Comics accounted for over have of those units. Action Comics #1000 did 52,129 units of reorder activity putting the total sales of the issue through Diamond around 501,916 units. Between the release of Action Comics #1000 and Man of Steel #1 DC released Action Comics Special #1 which sold 47,236 units and Superman Special #1 which sold 43,378 units.
The defunct titles category removed 1,097,731 units compared to last month.
The previous volume of Avengers ended last month to make room for the latest volume this month. The previous volume sold a total of around 206,336 units across four issues and the new volume sold a total of 198,096 units across the first two issues. Likewise the previous volumes of Justice League, Superman, Venom and Mighty Thor all ended to make room for new volumes.
The annuals/specials category added 30,057 units compared to last month.
The non-series category added 335,147 units compared to last month.