Yeah, forgot it's release date...but it did say Summer
Totori was the one that said fall...and it came out on September 27th, meaning it can be late September/Early October
As for how long, it depends really...I mean, they actually gave a solid release date for Legasista, so I think they really don't have an idea just yet on when this will be released
Well, a developer has good reasons to not give solid dates, but NISA only translates and dubs, and they've been at it for awhile, so you'd think they'd have a good estimate.
There are publishers who tell people when they have a good idea when, and publishers that hold dates back for as long as possible. I have a good feeling NISA is the former kind.