Yay, a new ROM mention! Still watching for them, so thanks! Presumably these checklists appeared in other titles too? ---A ROM Curator, Gary Martin, Jr.
Hi thereMARVEL UK had a long history of regularly cross-promoting their titles through various listings (more so than the likes of IPC who seemed to prefer House Ads for specific issues or events… usually a new launch, a relaunch of an existing title or free gifts) but they tended to be sporadic. I think several more in this format appeared around the same time. It's worth noting that this is a particularly bumper crop of UK titles.