There appears to be a 3rd wave for The Last Jedi and it should hit October / December. We saw that a single packed Supreme Leader Snoke and Resistance Tech Rose will be part of this wave. It seems the Fans Choice Jaina Solo will also join this 14th wave of the Black Series 3rd Phase.
Jaina can be pre-ordered now at Forbidden Planet. Expect more stores to follow suit in due course.