Board Thread:The Panopticon/@comment-1827503-20141110054247/@comment-188432-20141110172935

Death in Heaven makes it crystal clear that only a firm minority of the dead — Kate says "only a handful" of all tombs — have converted to Cybermen. That makes it statistically unlikely that Amy and Rory were converted to Cybermen.

Thus, for the purposes of the wiki, there is absolutely no reason to go around marking dead characters as Cybermen. Nor is there any utility in a category that suggests "possible" Cyber-conversions, because most of the dead weren't converted.