I don't think it's necessarily official. It won a priority poll against other skills, some of which have already lost 75 percent polls.
I don't think Dungeoneering would ever pass a real content poll (75 percent vote). Not enough people like it. Not 3/4ths of the community at least.
I think it's going to take a pretty amazing pitch for a new skill to be put in. 75 percent is inherently a difficult threshold to hit voting-wise, so it's going to have to be something very creative.
Here's what the description was for that poll:
"We want to see what content the Old School community is most interested in. This priority poll will help us determine where the priorities of the community are.
Once we have a good idea of what updates are important to you, we can begin offering specific pieces of content to satisfy this in future dev blogs."
Nothing that "won" that poll is getting put in without an actual 75 percent to pass poll.