Ok, here's an idea for a fun contest. I post a section from a comic cover and you guys try and guess what cover it's from.Whoever guesses correctly, gets to post a portion of a cover themselves, and we all get to guess. It's not good form to post a very tiny part of the cover, as it makes the contest too difficult.
Here's my starter - a clue is that this particular cover (like all of mine) is from the Silver-Age.
Superman #226 it is! The art team was Curt Swan and Murphy Anderson. Most of their Silver and Bronze Age covers were done for the Super-books (in the broad sense) in the period 1969-1971.
Mort Weisinger had teamed them up on covers, but didn't use them together on stories. Anderson became Swan's regular inker when Murray Boltinoff and Julie Schwartz took Action Comics and Superman over in the second half of 1970, and stayed on the Superman-books until the latter part of 1973. Schwartz reunited them a few times in the 80s, and they did more covers together after Crisis.
Swan had modernised his style and did some of his best art in the early 1970s. Anderson's detailed, realistic inks complemented his art wonderfully.
Altered logos is absolutely right Jeff. I'm only sorry it wasn't a bit harder! Still, at least it made you think. If I could have found a fourth logo that was smashed, then I would have gone with that theme, but it was late at night, and the Flash cover was the only 4th cover I could find.