List of first appearances/Preboot

Lists of the first appearances of recurring characters, equipment and Legion-related concepts in the Preboot family of eras. Planets and settings can be found listed separately at List of worlds/Pre-Crisis.

Legionnaires

• Chameleon Boy
  • First appearance - Action Comics v1 #267, August 1960
• Colossal Boy
  • First appearance - Action Comics v1 #267, August 1960
• Cosmic Boy
  • First appearance - Adventure Comics #247, April 1958
  • Co-founds Legion - Superboy v1 #147, May/June 1968
• Invisible Kid (Lyle Norg)
  • First appearance - Action Comics v1 #267, August 1960
• Lightning Lad
  • First appearance (as Lightning Boy) - Adventure Comics #247, April 1958
  • As Lightning Lad - Adventure Comics #267, December 1959
  • Co-founds Legion - Superboy v1 #147, May/June 1968
• Saturn Girl
  • First appearance - Adventure Comics #247, April 1958
  • Co-founds Legion - Superboy v1 #147, May/June 1968
• Superboy (Kal-El)
  • As Superman - Action Comics v1 #1, June 1938
  • As Superboy - More Fun Comics #101, January/February 1945
  • Joins Legion - Adventure Comics #247, April 1958

Villains

• Lex Luthor
  • First appearance - Action Comics v1 #23, April 1940
  • First interaction with the Legion - Superboy v1 #86, January 1961

Groups

• The Legion of Super-Heroes
  • First appearance - Adventure Comics #247, April 1958
  • Origin - Superboy v1 #147, May/June 1968
• The Legion of Super-Villains
  • First mentioned - Superboy v1 #86, January 1961

Equipment

• Time bubble - Adventure Comics #247, April 1958

Bylaws and Rules

• First mention of requirement that all members be under 18 years of age - Action Comics v1 #267, August 1960