From the Simon and Schuster website. The dates may be placeholders of course, but at least we know what kind of stories they will be, since the last canon fodder was unclear about them.
Smoke and Shadow:
Out November 2016, looks like it will be a short novella, digital release only
Envoy:
Out April 2017, this one will be a full fledged novel, with a trade paperback release.
Untitled (but we know it’s called Legacy from Onyx):
Out December 2017, looks like this one has been delayed. Also, like Envoy, this is a full fledged novel, with a trade paperback release.