We don't know sadly. Our best hope at the moment is for someone to publish an unofficial subbed version online (like what happened to 2205). That's most likely going to happen sooner or later, hopefully before chapter 2 comes out since the Blu Ray is already available in Japan and will become available online in October.

Obviously an official version would be preferrable, but as you said there's no news about that, and since 2205 was niether dubbed or subbed I wouldn't get my hopes up.

Two episodes have received unofficial subbed versions and have been published online.

That's old news! Both episodes of 2205 and 3199 have already received english subtitles on both Aniwave and Kissanime, just thought you guys should know.