Here’s a couple of ads that ran in Justice League of America #124 from November, 1975:
Arguably the two premier DC heroes, showing off to the readers where they can be found.
I’ve just had a look at Previews for the April listings and thought I’d update those ads:
We’ve gone from six titles each in 1975 to four for Superman and eight for Batman; it would have been nine but it looks like he’s not in April’s Detective Comics.
I bet Superman can’t wait for Brian Michael Bendis and his big relaunch . . .