Shadow of the Tomb Raider

Tomb Raider 12 is the upcoming sequel to Rise of the Tomb Raider, and third game in the Survivor Timeline.

Square Enix inadvertently confirmed the game during E3 2015.

It was later confirmed that the Game would be directed by Ian Milham, who served as the Art Director for the Dead Space series and Creative Director of Battlefield Hardline.

It is currently unknown if Rhianna Pratchett will return to write the game, or whether Camilla Luddington will reprise her role as Lara Croft.

Plot
TBA

Gameplay
The game is expected to be a third person action adventure game.

It is likely that the game will feature hunting gameplay much like the other games in the survivor timeline.

It is believed that game will feature hub areas much larger than those featured in Rise of the Tomb Raider, or be more densely packed with challenges and Tombs. Some fans believe the game may feature an open world, or return to the series roots of being set in multiple geographic locations.

Development
The game was confirmed to be in early stages of development as early as at least June 2015.

Possible Hints for Plot
The end of Rise of the Tomb Raider shows a map which seems seems to imply that the game may be set in Yucatan Paninsula in Mexico, much like Lara Croft and the Guardian of Light.

The map also shows an ID card belonging to Kennard Montez, an agent of Trinity, who Lara had several encounters with during the events of the novel Tomb Raider: The Ten Thousand Immortals, he is also believed to be the man who stole the book from Lara.

Possible Leak
A reddit user caught a glimpse of a laptop screen on a subway on October 31st, with a banner image showing a logo for a project titled, "Shadow of the Tomb Raider"

The leak indicates that Crystal Dynamics may not be the developer and that Eidos Montreal, developer of video game series' Deus Ex and Thief would be taking over. Eidos Montreal previously worked on the multiplayer for Tomb Raider. However, given that Ian Milham was hired as the new director for Tomb Raider at Crystyal Dynamics it is unlikely that Crystal Dynamics won't be the primary developer.