Both DC
and Marvel May 2017 Solicitations were released this week. Last May 2016 DC Comics
released DC Universe: Rebirth #1, which was closure for the New 52
as well as the merging of the DC and Watchmen universes. This year they are
kicking off events every month beginning in January with the conclusion of the Justice
League vs. Suicide Squad. Then in February we saw the launches for the new Justice
League of America and the return of the Wildstorm Universe. In March we
will have Superman Reborn, April was The Button (The crossover
between Batman and Flash titles), and now in May we have the Lazarus
Contract which runs between Titans, Teen Titans, and Deathstroke. 
As far as publishers are concerned, DC Comics have an overarching story where each of the stories builds upon DC Universe: Rebirth. Superman Reborn and The Button are prime examples of DC building a universe while Marvel has an event with Secret Empire. Regardless whatever happens Marvel will return to its original status quo while DC layers legacy within its titles.
Retailers
should limit their orders based on pre-order sales. A conservative approach is
the best in the collector’s market to limit inventory which will later drive up
demand. Readers
should pick comics based on writers and artists they enjoy. If they enjoy the
comics then somewhere down the line someone else would enjoy the stories as
well. Key to collecting would be to focus on variant covers if possible to
enhance collectability.