Ok, how about this for an idea. We take it in turns to post a favourite (British spelling) comic cover every day. This went really well on the comic fan website that I used to frequent. What we tried to do was find a theme or subject and follow that, until we all got bored with that theme. I'd like to propose a theme of letters of the alphabet. So, for the remainder of October (only 5 days) and all of November, we post comic cover pictures associated with the letter "A". Then in December, we post covers pertaining to the letter "B". The association to the letter can be as tenuous as you want it to be. For example I could post a cover from "Adventure Comics" or "Amazing Spider Man". However Spider Man covers can also be posted when we're on the letter "S". Adventure Comic covers could also be posted when we're on the letter "L" if they depict the Legion of Super Heroes. So, no real hard, fast rules - in fact the cleverer the interpretation of the letter, the better, as far as I'm concerned.
And it's not written in stone that we have to post a cover every day. There may be some days when no cover gets posted. There's nothing wrong with this, it just demonstrates that we all have lives to lead.
If everyone's in agreement I'd like to kick this off with one of my favourite Action Comic covers, from January 1967. Curt Swan really excelled himself here.
Discussion and voting on future monthly themes takes place on the "Nominations, Themes and Statistics for A Cover A Day" thread. Click here to view the thread.
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I found this synopsis (not just location) on Comic Vine
Superman Island (Location) - Comic Vine
The second apperance of Superman's Island (in 1980!) was also the first mention of H.I.V.E., who was a frequent foe of early New Teen Titans.
I am not certain, but it may also have been the first Superman story by Marv Wolfman.
J. Jonah Jameson's opinion of Spider-man was "threat or menace", but when the shoe's on the other foot... (Image courtesy of the Grand Comics Database.)
Captain Marvel #17
I suspect many people here
...know the "Negative Crisis on Earth One-Two", a precursor to Crisis. The cover makes it look like a League vs Society battle but, really, it was members of each vs members of each. Superman was on the other side, for example, from GL, the Flash, and GA. The ones who turned villain were affected by "negative radiation" from cosmic "black spheres."
Who could that be? I wonder if the color scheme provides a clue?

Spider-Man demands vengeance!
Even though his dying didn’t “take,” like the previously posted Avengers #15 cover, the hero doesn’t actually kill the bad guy. Verdict: accidental death.
Had this been done realistically, the fledgling All Star Squadron would have been massacred by a mind-controlled Justice Society!