If previous releases are anything to go by it won't be released in stores, just online. However, From what I've read, unlike earlier releases, it is likely to be released for the iOS and Android platforms at more or less the same time as the releases for Windows and Mac OS.

LDW (wisely in my opinion) don't usually give out an expected release date. There are just too many things that could go wrong that would delay the release. It's much better to keep people in suspense than possibly having a horde of disappointed fans if something happens and the launch can't take place when expected.