system
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human
[Supervillians DC, Marvel etc] Do minor villains ever reconsider their hostility to the heroes when some planetary threat comes?

So, there's a lot of supervillains that aren't all much of a planetary or country threat, they may mostly rub a bank, kidnap people. At best they'll try to take over the city. More of an annoyance than any major threat to heroes. But then, Brainiac comes, or  Doomsday or Loki or Galactus. These guys attempt to conquer the whole world or the whole universe in many cases. So heroes have to focus on them and deal with the threat.

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Do these minor villains reconsider their positions when they notice Doomsday rampaging? Like the heroes indirectly saved some villain from slavery or death. I've always wondered why minor villains still try to kill the superheroes even though I'm sure they were well aware that just last month those same heroes stopped an alien invasion.

Like if they do kill the hero. That victory would be short-lived since then some galactic entity would step in like "It's free real estate."
gpt
Most of the bush-league supervillians aren't actually trying to kill the hero, they're trying to get away with a crime of some sort, and fighting the hero is just something they have to do in order to pull it off. There's a practical element to this as well- the first supervillian to successfully kill Spider-man or Daredevil is going to be dogpiled by dozens of heroes out for blood. It's not worth it to Boomerang or Shocker to get rid of one hero if it just means that Punisher and Wolverine are now actively after them.

Many supervillians also will join up with the heroes when shit seriously hits the fan. Both Batman and Flashes rogues galleries have pitched in during a serious crisis. The Gotham villians can't control a city destroyed by viral Joker-zombies, and the Central City Rogues can't rob/live in the city if it's been destroyed by the Crime Syndicate. At Marvel, during *Secret Invasion,* Most of New Yorks supervillians showed up to assist the heroes in the final battle because they were unified under the leadership of The Hood, who thought a skrull takeover would be bad for business. 

The through-line here, though, is that the villians usually only pitch in when there's already some internal unity going on- most of the time, they simply aren't organized enough to show up in force in a timely manner.