Don't pull any of that eggsistential "are we really here" nonsense on me, OK, Emmanuel Kant Spell?

Tales of Suspence featuring the Sentry #1.

No correct answer yet; and frankly, I will stand in awe of anyone who gives the answer I'm thinking of.

Yeah, except, since you don't read more modern comics, you don't know if the answer you're thinking of is one that still holds, as Norb just mentioned one in particular.

That is a point, yes. The one Norb said was an actual comic in the 616-Marvel Universe?

This being Marvel trivia, I'm pretty sure you're NOT looking for my answer. The most valuable comic is Action Comics #1...the first appearance of Superman. (Goes for about $750,000.00 in MINT condition.)

I believe it was mentioned in the New Avengers series, when they re-introduce Sentry... tho no one remembers him, they find out he's also a comicbook character. Tho that's not to say that was considered the rarest comic in the M 616U, if I recall they also mentioned one in She Hulk's book as being very rare and that had nothing to do with Sentry.
Welcome to the age of Joephisto, where a simple change of mind (or is it just a simple mind?) can alter a universe for no apparent reason whatsoever... but nothing forever.

Hmmm...has it ever been stated that DC Comics exist in the Marvel Universe? (The way Earth-Two heroes were comic book characters on Earth-One?)

They never actually said it, but in an issue of What If that crossed over with Quasar, one of the "what if" universes the Watcher has on his screen shows the scene of Lex Luthor with Doc Ock breaking out of prison together.
I mention the Luthor bit cause Marvel 616, when they show that the chars exist as real and used as a basis for the comics, then Luthor's appearance suggests he was used in a comicbook form in at least one Marvel U, but not necessarily the 616 Universe.

I'm going to cancel this as being a bad idea for a question.

The comic I was looking for was Purple Pig #1, 1937; seen when Iron Man attended the San Diego Comic Convention.

The thread is now open.

Semi-Marvel question;

In the DC animated Universe, the JLA animated series, to be exact, which three characters were used as a parallel to the original Marvel universe non-team of the Defenders (pre-Silver Surfer).

Are we the only ones posting questions and answers here? I can't believe nobody else got this.

Doctor Strange, Sub-Mariner, and the Hulk were replaced with Doctor Fate, Aquaman, and Solomon Grundy. (Grundy even referred to Hawkgirl as "Bird-Nose", the name the Hulk used to call Nighthawk.)