Develop magazine have reported that Deus Ex 3 will be made in the Tomb Raider engine.
Talking to Eidos Montreal's new head honcho, Stéphane D’Astous, they learned the new team has plans to use Crystal Dynamics' engine, which they intend to develop further. He explains,
"In former positions where I worked technology was always a grey zone, a question mark. I'm relieved that here at Eidos we have two great internal engines - one from IO Interactive and one from Crystal. We chose the Crystal engine because we plan to help develop this engine more and then share it back with the rest of the company, the other Eidos studios."
The rest of the Q&A can be found here.
So we should probably add a remark about JC Denton leaping from cliff-face to tree branch, shooting a tiger, then swimming in insane circles before drowning under a rock. But it seems like good news to us. While for the sake of Tomb Raider, the engine is forced into a distinctly tile-based design, breaking free of that will hopefully let it shine as strongly as it did in the wonderful waterfall scene in Tomb Raider: Legend. It's capable of looking extremely beautiful.