Originally Posted by
CentralPower
Characters like the Squadron would inevitably come in to conflict with the characters in mainline Marvel.
Even discounting variants of Squadron Sinister, the whole point of the Squadron is that they are a team of over-reaching superhumans. They take over with the best of intentions, often with bad results. Then, they either fail, or create other problems. The more they interact with mainline Marvel, the more they appear as clowns. (And, Marvel has incentive to use a bastardized Justice League to mock DC's characters.)
The 12 issue series from the 80s (arguably the smartest treatment of the characters) depicts them as failing catastrophically.
The New Universe imprint imprint featured superhumans that screwed up on a large scale, much like the Ultimate imprint.
I am not sure what Marvel's plan for the Squadron and Hyperion was, post-"Secret Wars". But, it was probably a mistake to use them in Marvel's main setting.
I am skeptical of this.
In 1985, using the Squadron as proxies in a Justice League story that DC simply could not publish was bold. At the time, neither of the big 2 was likely to publish a comic where the main character failed, or was fundamentally flawed. (And, no, Marvel characters having baggage or being sad about something is not the sort of foundational flaw that I am talking about.)
Now, the big two are, if anything, too willing to undermine their main characters, using ideas in mainline comics that should be kept in an editorial vacuum. (How can Marvel's heroes come back after either "Civil War" or "Secret Empire"? "Amazons Attack" or "OMAC Project" should have been the end of Wonder Woman and Batman as heroes at DC.")
Comics published in an editorial vacuum (such as "Master Men" or "Red Son") arguably make the Squadron obsolete, and not just because the newer comics are written with modern sensibilities.