Board Thread:Questions and Answers/@comment-24840626-20160528120819/@comment-16461120-20160528210854

To add to what ADour said, #7 is sort of a prelude to the Sabretooth arch and the Civil War II tie in lasts at least through #17.

Also, if you've not read it already, #3.1 introduces Masacre and is available as an English "translation" in if you don't speak Spanish. (I put translation in quotes 'cause it's purposefully done in questionable English.)