How we mark skippable crossover tie-ins

Action figure and printed comic colors on a desk

A crossover roadmap at Portal Route Grid has two inks: spine and satellite. Spine issues carry the event’s decisions. Satellite issues show a neighborhood reacting, a team arguing, or a cameo punching the same explosion from the left.

Skip flags are honest. We do not hide that a character cameo exists; we say you can finish the ending without it. Collectors who want every street-level beat can still walk the satellite column.

NFT drops sometimes release a satellite title before the spine. Reading the cameo first spoils a reveal the core book was meant to deliver. Chronology notes on the roadmap prevent that inversion.

The goal is a finished story, not a complete warehouse of jackets.