You perhaps need to define main cast carefully. Where do Servalan, Travis, Orac, Zen, Slave stand? Zen could be considered one of the main cast, but there's a lot more fanfic extant about Orac. Those interested in Servalan have certainly been known to complain of the lack of interesting fiction involving her.
Another thing that might be interesting would be to have a story mainly about original characters (or series one-offs), but allow a brief cameo from the whole crew.
Good point. With my hypothetical "Pollux the genetically engineered" story, I thought it quite possible that the Liberator might be contacted occaisionally from a distance, allowing for a marginal involvement of the crew. Shall we say, any single recurring character can be used in 100% of the story so long as they are dealing with original characters or a one-show character. (Allowing for Travis and Parr going on a minesweep mission, for instance). Any 2 character can be given a story together, provided they interact no more than 25% of the total story _and_ have other people to deal with. (Allowing, for example, Blake and Jenna to meet again post Star One, but forcing a strong storyline for them as she works with the Dyonast Smuggler's League only to discover they are transporting arms to the Hurray For Blowing Things Up Rebellion which Blake is allied with only until he can move to saner ground). Or, the rebels can be presented as a team, but can show up for no more than 10% of the story... useful for moving Surpercy's Squad from the planet where Space Commander Chauvelain is tracking them down to an apparently nuetral planet, but not enough for them to hog the spotlight when Surpercy overhears the plot that will bring the nuetral planet under Federation dominion. Percentage would be determined by running a word count. Yes, you could mess with my head by flashing from scene to scene so fast it's not worth my while to count, but if you have a wonderful story idea which would go above the percentages I've suggested, I'd prefer you just say, "Soolin and Vila are together for 35% of the story, but there's an orphaned 12 year old who is really the focus... and I'll probably let it slide. One of the key points, though is that Vila and Soolin probably aren't paired that often, and the child is really important. If you create a Blake and Avon story, and put in a bunch of other plot that really stands as padding, I'll probably suggest it would go better pared down and put in a zine dedicated to Blake and Avon fandoms. That said, I really respect all of you too much to think you'd do that. You could have a story 100% about Zen before Blake, etc found the ship, or Servalan in the Academy... as long as you introduce new elements. Any other questions? I love the idea of this zine, the more I think about it. It's a wonderful chance to get new faces into the spotlight and focus on untouched aspects.