2015:
Ken Lobb: "Maybe we'll see another Joanna Dark game with Joanna by 2020. That would be an interesting year to bring her back."
2018:
IGN's podcast Unlocked 328 (January 2018), Ryan McCaffrey discussing about Perfect Dark rumors: "The Coalition, they are allegedly assisting on a new Perfect Dark game with another unnamed studio".
Then Alanah Pearce said she heard about it from sources.
At E3 2018, Phil Spencer said that he was talking with Gallagher (Studio Head of The Initiative) "
about some things in our past that might be interesting" and pointed out how Gallahger loved "
working on Lara Croft and Tomb Raider, kinda reworking some of that franchise".
2019:
The Coalition seems to be helping The Initiative
2020:
"old things :-)"
"The Initiative's unannounced AAA Xbox game has "weapons, gadgets, and camera surveillance"
According to a former employee's career profile
www.gamesradar.com
I guess we will find out in July if she will be back.