Two tremendous teams in two very different eras that reflect quite a bit with one another. The Legion of Super-Heroes was the 30th century's premier protectors in a time when a variety of supervillains and interplanetary intrigue sparked a need for superpowered teenages to band together under R.J. Brandt's sponsorship. Inspired by the 20th century's Superboy, the Legion had throughout its entire history over forty members serving in one status or another... combating foreign foes like the Khund or their opposite number, the Legion of Supervillains.
Over a thousand years prior to this and in an adjacent universe, the All-Star Squadron had been called upon to likewise stem the threat of foreign and domestic terror. With Superman and his Justice Society allies headlining this team, a variety of seemingly solo heroes made their mark during this golden age of mystery men handling the Axis powers and powerful criminals with the same tenacity and grit. And creating legends as a result.
From their epic headquarters, first borrowing the designs of their inspirations before adopting more palatial settings to meet together, to their large membership that meshed well with one another, to their timeless example of true heroism. The Legion and the Squadron were definietly teams for the ages!