That means Firestorm, Vixen, Vibe, Steel and Gypsy!
Multiplex (Danton Black), Killer Frost (Crystal Frost) and the Hyena ...and was all set of face the menace of Typhoon in issue #6...but Firestorm was cancelled with Firestorm #5 (October-November, 1978, as part of the DC Implosion, with all issue by Conway and Milgrom).
Green Arrow leaving the JLA for a time (taking the street hero idea Black Lightning professed to), and for a back-up series in the Flash for Firestorm as well, starting with Flash #289 (September, 1980, by Conway and George Perez), and even a team-up with Flash in Flash #293 (January, 1981, facing off against Superman foe, the Atomic Skull), as well as regular standing in the JLA, and even a team up with Batman in Brave and the Bold (#172, in March, 1981) and another with Superman in DC Comics Presents #45 (May, 1982), remaining in the back of Flash until #304 (fighting Typhoon, Multiplex and Hyena), before getting his own title, the Fury of Firestorm (written by Conway, and art to start by Pat Broderick, starting in June, 1982).
Martian Manhunter, Zatanna and Elongated Man, who brought along his wife, Sue), and the team without a headquarters (as the JLA Satellite had been severely damaged during the Martian battle....).
New Kids On The Block
...all in Justice League of America Annual #2 (October, 1984, by Gerry Conway and Chuck Patton).
Each of these characters had their own history, and some even before the JLA Annual....
Eventually premiering in Action Comics #521 (July, 1981, by Gerry Conway and Curt Swan), the Vixen helped Superman stop poachers in India, and then, in DC Comics Presents #68 (April, 1984, by Gerry Conway and Curt Swan), the pair faced the psychic force of Admiral Cerebrus before joining the JLA.
Commander Steel of the All-Star Squadron during World War II. Hank Heywood III volunteered to become a cyborg (unlike his grandfather) to enable himself to become a hero, and he supplied the headquarters called the Bunker (located in Detroit) as a headquarters for the new Justice League (as well as Dale Gunn, who worked for the first Hank Heywood, and ended up supporting the new JLA).
Hank's powers as Steel were strength, speed, the invulnerability (at least as much as metal), and enhanced senses (making him a super-hero version of the Six Million Dollar Man), and came from the operations his grandfather had performed on the young man to quite literally make him a hero.
Vibe joined the JLA when they ended up in his backyard with their new HQ in Detroit, and his fiery personality and youth clashed with more experienced members of the team (and, Vibe was none to happy that his sister, Rosa, was infatuated with Steel).
Hide In Plain Sight
Gypsy simply observed the JLA during the Annual, as well as during the early days of the new team in Justice League of America #233 to #235, finally officially joining the team during their battle with the Overmaster and the Cadre in Justice League of America #236 (March, 1985).
...even meeting up with past JLAers like Superman, Batman, Green Arrow, Black Canary and Firestorm in finding the fate of the Red Tornado in Justice League of America Annual #3 (1985).
This new JLA was never quite accepted (even Aquaman left after his wife, Mera, returned to him in Justice League of America #243 of October, 1985), and that's when the world changed with the Crisis On Infinite Earths, including a fight with Commander Steel and Mekanique (and working with the JSA and Infinity, Inc.), giving Joe Staton time to do the art of Justice League of America #244 (November, 1985) and Luke McDonnell to take over with Justice League of America #245 (December, 1985), where he'd stay as artist until the end.
All of this...and they were still the great creations of Gerry Conway!
Seems Detroit will still hold on to its super-heroes!