Whither the second printing?

I guess this post can be seen as an epilogue of sorts to my posts about the John Byrne reboot of the Superman titles in the mid-1980s. Essentially, I came across this 1988 issue of Superman from near the tail end of Byrne’s run: …where you might see this oddly-formatted blurb in the corner: Now around this time, DC Comics was making a big promotional push to let folks know the series was about to be released on a biweekly basis. To wit: Amazing Heroes #133 (the “Preview Special”) from earlier in the year contains this bit of information within its Superman coverage: And just to gild the lily, here’s an excerpt from a house ad located right next to this entry, warning you of what’s to come: As it turns out, the biweekly Superman plan is called off, as Byrne very publicly quits the Super-books around this time, He’s only involved in a couple more issues after this. It’s my memory that the “Power Failure!” blurb you see on the cover of #19 had shown up in print ads and such prior to its…