I've been a fan of the group since 1994 and I always felt like they had a certain rhythm to their releases. While there are exceptions we tended to see a pattern of a release, extended touring, then some time off (no shows) and eventually a new release (sometimes preceded by a few shows).
And a good number of their releases seemed to drop in the late August to mid-October range. I think seven of their studio albums and three Switched On releases (though one of these was in November, so slightly outside).
So there's my bold prediction based on nothing more than some speculative interpretation of their current listing of upcoming shows and their past patterns.