In need of a new secure headquarters, the Justice League moved into an orbiting satellite headquarters in Justice League of America #78 (February 1970). The Elongated Man, the Red Tornado, Hawkwoman, Zatanna, and Firestorm joined the team, and Wonder Woman returned during this period.
Len Wein wrote issues #100–114, in which he and Dillin re-introduced the Seven Soldiers of Victory in issues #100-102 and the Freedom Fighters in issues #107-108. In the fall of 1972, Wein and writers Gerry Conway and Steve Englehart crafted a metafiction an unofficial crossover spanning titles from both Marvel and DC. Each comic featured Englehart, Conway, and Wein, as well as Wein’s first wife Glynis, interacting with Marvel or DC characters at the Rutland Halloween Parade in Rutland, Vermont.
Beginning in Amazing Adventures #16 (by Englehart with art by Bob Brown and Frank McLaughlin), the story continued in Justice League of America #103 (by Wein, Dillin and Dick Giordano), and concluded in Thor #207 (by Conway and penciler John Buscema). As Englehart explained in 2010, “It certainly seemed like a radical concept and we knew that we had to be subtle (laughs) and each story had to stand on its own, but we really worked it out. It’s really worthwhile to read those stories back to back to back — it didn’t matter to us that one was at DC and two were at Marvel — I think it was us being creative, thinking what would be really cool to do.” Justice League of America #103 also featured the Justice League offering membership to the Phantom Stranger. Len Wein commented on the Phantom Stranger’s relationship with the JLA in a 2012 interview stating that the character “only sort of joined. He was offered membership but vanished, as per usual, without actually accepting the offer. Over the years, other writers have just assumed [he] was a member, but in my world, he never really said yes.” Libra, a supervillain created by Wein and Dillin in Justice League of America #111 (May–June 1974), would play a leading role in Grant Morrison‘s Final Crisis storyline in 2008.