There has been various discussions on what to do when an older, good-for-its-time, answer, becomes obsolete due to new canon (Thanks, Disney!)
All the usual proposed solutions seem to fall into three buckets:
- Effective but against SE policy/spirit (edit obsolete note into the answer)
- Effective but controvercial (close old Q as a dupe of new one)
- Perfectly in spirit/rules but ineffective (post new answer, pray it gets vote parity by the time Taco Bell wins entertainment wars, buys Disney, and reboots canon again).
However, I don't recall seeing any discussion of using yet another mechanism available on SE: moderator notices (most usually found on Skeptics.SE)
I would like to propose that we create a formal notice, something to the effect of "This answer was correct in the past, but has been superceded/contradicted/made obsolete by new canon from the franchise", that site moderators can glue officially on such answers.