Well sure, but all the popular stuff have gotten at least announcements. If it's the second most popular isekai after SAO, it's strange it doesn't have an anime. Not only that, but I'm not seeing it on the list of bestselling LNs from last year:
https://www.animenewsnetwork.com/new...s-2017/.124897
https://www.animenewsnetwork.com/new...e-2017/.124898