There is nothing more exciting than a team-up. Disparate characters coming together to become something greater, or face a foe that would be too strong for an individual hero. This idea is pretty much the whole selling point of cinematic universes, like the MCU or Arrowverse. But its not just comic-book media. There are powerful teams in fiction, who are often regarded as the strongest group of warriors in their respective universe. One such group is the Power Rangers.
Source：https://www.cbr.com/strongest-teams-power-rangers-could-defeat/
