Flipping through my back issues, I’ve noticed most of the ads have been part of the DCU/Coming Soon pages rather than the full page ads we’re used to. Here’s what I’ve found:
The only full page ad for ECLIPSO: THE DARKNESS WITHIN that I could find. 
Two panels from a DCU/Coming soon page 
Another DCU/Coming soon page 
And another DCU/Coming soon page 
And yet another DCU/Coming soon page! 
And another one; man, they skimped on the ads for this event. 
This one barely counts as DC clearly wanted to push the BATMAN: GOTHIC trade at the same time! 
Not an ad, but an article by editor Michael Eury about the genesis of the ECLIPSO event. 
And after the event, an ad for the ongoing series as well as Valor’s title. 
An ad for an Eclipso poster 
Another small ad from a Coming Soon page.
Crisis on Earth-Prime 