Any get one of these? What is it, and is it likely to be sold by FFG later (like other Gencon labeled Stand Alone Scenario packs)?

Check that (very good) article and release news:

https://www.fantasyflightgames.com/en/news/2018/5/4/the-wizards-quest/

https://darklingdoor.wordpress.com/2018/08/12/spoiler-alert-the-wizards-quest/

And yes, it'll be available later.

I would count the gencon and fellowship quests among my favorites, but this concept does not excite me. I think the haradrim cycle was incredible, and I liked the idea of 2 paths in crossing of poros but in practice that quest was the one dud for me in a pile of gems. Hopefully I will be proven wrong.....

These quests are very fun. Sometimes we just shuffle several sets together and go. The Gencon quests have always been released at a later date. The only exception is the promo (Lore Glorfindel this year) won't come in the retail version.