Yes it's true. The connection between the groups does need an historical timeline. The evolution to the 4X club is the goal.
I would like to see two or three things explored.
1. How these groups emerged and then coalesced from groups that used remote cabins and old ships (like Death Dance and High Seas Snuff respectively) to a group that has its own island
2. How are girls selected to spend the last few days/hours of their lives with the organization? I know some are stalked and some appear to just be targets of opportunity and some are paid for, but are these girls random victims or is there an entire database of of women the organization has marked for destruction? If there is a database how does a girl get put on it? I kinda like the idea that at any one time, the 4x club has dozens if not hundreds of gals they've sentenced to death and the girls have no idea until they are apprehended by the club for their final and well deserved comeuppance.
3. The table of heads in this tale reminds me of the Slut Museum at the end of Death Dance. High Seas Hell is part of the history to 4x club, would I be correct in saying the club in Death Dance is too? Anyways, I'd like to see how guys get membership. I know Woodburn, in his classic, had a guy get entry by selling his wife, daughters and their girlfriends to the club, but in your universe how do guys get into the club?
Anyway, I look forward to the imminent and final disassembly of Eileen, & the delightfully devilish fate you have planned for Candy as a gal drawn that sexy can only be in store for a very creative, entertaining, and immensely pleasurable (though to be fair, I don't think Candy will find any pleasure in the last several pages of your comic) denouement.