"soon to be announced title" in the works, with Matt McCulloch working on some "wildly cool environments" for the project.
This is likely to be announced, or at least fully revealed, at E3 this June. Crystal Dynamics of course most recently released the reboot of Tomb Raider to high critical success.
There's no hiding the fact that Square Enix is very interested in the new and fresh faced Lara Croft getting more instalments after her time battling to survive on the island.
"Creating wildly cool environments for a soon to be announced title for Crystal Dynamics," McCulloch's profile. A separate job listing for a senior artist says they'll be part of a "brand new AAA game" and that it's "in the earliest stages of development". This new title is likely not a new Tomb Raider as a new IP is believed to be on the books.