It was a hack
You'll find this covered in that question (and in the comments below), but to reiterate;
We decided that the Revisit should be locked for a week before allowing answers. The decision to "lock" was based on the assumption that the Wiki Answer lock only prevents answers, but on further investigation it also prevents votes and comments.
So we decided to close it instead, which we thought only prevented answers, but it turns out it also prevents it being featured.
As a hack around this limitation, I created a community event, which had the added boon of letting it show a time-down to when it would be reopened. Roughly.
The event has now expired and since the question is reopened it should show up as a normal Featured once that box caches (which is once per 24 hours, IIRC).