There's supposedly some kind of "3D anime" planned for
Spice & Wolf for 2019.
But the ANN article and/or its source is rather vague about what the content is. Something about "a new scenario is being written", but whether that just refers to a new "anime" script and is therefore just the continuation of the series (i.e. new anime season, at least content-wise), or if it's completely new, original material, is still unknown.
It's also not known if it's just a single episode or some multi-episode series or something else entirely.
Source:
https://www.animenewsnetwork.com/bbs....php?t=3084510