Yeah, ElfQuest. Now, some people do write canon-character EQ fic; I've seen it on ff.net. But back in the day, we all created our own tribes and characters, and basically ran things like a big shared universe. Someone would be the editor/coordinator, and keep track of timelines and maps and character sheets, and like that. Most of the fan clubs put out quarterly zines with stories and artwork. The group I was most involved with eventually ended up doing crossovers with several other tribes, and we developed a huge, ten-thousand-year timeline and a map the size of North America showing where everyone was and when everything happened. It was a world-builder's wet dream. Of course, it had its downsides, too; there were feuds and squabbles galore, which too often affected the way stories got written (or didn't get written).