Board Thread:Questions and Answers/@comment-1894786-20161205042239/@comment-4651179-20161205121035

The Black Order made public the existence of the incursions back in Time Runs Out when they confronted the United Nations.

Regarding the status of knowledge on incursions post-SW, the "incursion crisis" was explicitly mentioned in by Maria Hill during a press conference. Along with what you mentioned, those two are the only instances I'm aware of that reference incursions post-SW.