New52 Earth-2
A close analog of the Classic Legion based on Earth-2 and appearing in Legion of Super-Heroes v.7.
DC, in its infinite wisdom, rebooted the entire DC Universe line of titles starting with November 2011 issues. Various Legionnaires were given new looks, and seven Legionnaires were sent on an extended mission into the 21st century.
In its last issue, this version of the Legion was retconned into the New52 version of Earth 2.
Young Clark Kent was a member under the name Superboy, a name which he did not use in his own time period.
Supergirl was briefly a member.
Lar Gand was a Daxamite traveler who encountered young Clark Kent long enough to get the name Mon-El, but had to go into the Phantom Zone to escape lead poisoning. In Superman's time, Mon-El was released from the Zone and served as Superman's replacement while Supes was on New Krypton. After helping Supes and the Legion defeat Brainiac, Mon-El seeded various alien worlds with cities rescued from Brainiac's collection. Mon-El then went back it no the Phantom Zone, where he waited until released by the Legion nearly a thousand years later. He was, for a time, a Green Lantern.