Rise of the Tomb Raider's sequel--which has been hinted at but not announced--might be called "Shadow of the Tomb Raider" and it's possible Crystal Dynamics won't be its developer.

This information comes from an unexpected source: a person on a subway. Reddit user Tripleh280 posted the picture below, which shows the name Shadow of the Tomb Raider on a Microsoft PowerPoint presentation for the game. There is more text on the slide, reportedly detailing some element of the game's visuals, but it's too blurry to make out.

Kotaku heard from a source today that Shadow of the Tomb Raider is the name of the next Tomb Raider. That Square Enix would make another Tomb Raider game is no surprise, but what stands out more is that the site claims Thief and Deus Ex: Mankind Divided developer Eidos Montreal is working on the unannounced game.

A Square Enix representative told GameSpot, "We don't comment on rumors and speculation."

At Gamescom 2015, Square Enix boss Phil Rogers let slip that a third game in the Tomb Raider franchise that began with the 2013 reboot was on the way. This came up when we asked him about the controversy and backlash surrounding Rise of the Tomb Raider's exclusivity deal with Xbox.

"We believe first and foremost this is the right thing to do with Tomb Raider right now," Rogers said about the deal with Microsoft. "What it's done for the sake of the studio and the next beat with the Tomb Raider trilogy [emphasis added]... But the backlash is--we've watched carefully and we believe it's the right thing to do."

In August this year, Crystal Dynamics hired Visceral Games veteran Ian Milham to become a game director for the Tomb Raider franchise, which furthered the suggestion that the studio was making a new Tomb Raider game. Crystal Dynamics is also working on a new IP.

Rise of the Tomb Raider finally came to the PlayStation 4 in September in the form of the 20 Year Celebration Edition.