Among other sources, Variety is reporting that TriStar has set the release date for Meryl's upcoming film Ricki and the Flash for June 26, 2015. This is similar territory to The Devil Wears Prada in 2006, so it's understandable why the powers that be chose it. Of course, filming hasn't even begun, but it's likely happening early fall.
Considering that Ricki is being released in June next year (not typically prime Oscar territory, but again remember Bridges of Madison County, Prada and Julie & Julia), I wonder if maybe The Good House will shoot shortly afterward. If Ricki somehow started in early or mid summer, it's not unrealistic for another film to start in October, for example. I picture The Good House as more typical Oscar fodder, so a fourth quarter release seems more likely. Perhaps we'll get two powerhouse lead performances from Streep onscreen next year.