JUSTICE LEAGUE 200 was a great special issue by George Perez, with chapters by most of the Silver Age greats like Joe Kubert, Dick Giordano, Carmine Infantino, and then-newcomer Brian Bolland. This was in the same tradition of many DC special anniversary issues of the time, with a good story, and a great line-up of artists that spanned the era of the title's existence. Although Kubert and Infantino had never drawn JLA up to that point, at least not in their own book.
Perez also did a mini-portfolio around the same time, a dozen or so decorative 4" X 6" postcard-size individual sketches of each JLA character, that I occasionally see on E-bay.
Here's the Zatanna one:
That may or may not have been part of JLA's 200th anniversary celebration. Another bonus was that Perez was the regular artist on JLA (with a few breaks) from 184-200, and covers for about 10 issues after.
So issue 200 was something of a grand finale to Perez's run.
JLA (at least in the period I was reading it) was among Gerry Conway's better written series. He seemed to have a great sense of the characters and their 20 years (up till then) of continuity.
