Rise of the Tomb Raider, the follow-up to the 2013 reboot of the series, might not be exclusive to new-gen consoles. Amazon lists both Xbox 360 and PS3 versions of the game.
The Amazon listings don't look all that definitive. They have box art but it's merely the game's logo with a black background - in other words, placeholder art.
However, there is some additional evidence that Rise of the Tomb Raider is being developed for last-gen consoles. The game's listing at Xbox.com mentions both an Xbox One and Xbox 360 version:
Crystal Dynamics and Square Enix haven't announced any platforms for Rise of the Tomb Raider yet. The wording of the first press release sounded like it was a PS4, Xbox One and PC release though.
“With the power of the new generation, and our proprietary Foundation engine, our high octane action moments will be even more epic," said Darrell Gallagher, Head of Product Development and Western Studios at Square Enix. "Multiple locations around the world will be filled with exploration spaces that are some of the most beautifully hostile places on earth and over three times larger than we could achieve before."
It does make sense for Crystal Dynamics to release Xbox 360 and PS3 versions as well, though. Those consoles' player bases are far larger than PS4's and Xbox One's. That'll be true even in 2015 when the game launches. Developing for four consoles instead of two would greatly expand the sales potential for the game.
Keep in mind Square Enix's outrageous expectations for the series, too. They were disappointed with the 2013 reboot selling over 3.4 million copies in its first month. A cross-gen launch would help them hit whatever lofty sales projection they have.
It's surprising that Square Enix hasn't announced the game's platforms yet, though. You'd think that they would want to get that information as soon as possible so they can start accepting pre-orders. It could be that they're still finalizing the list of platforms.
Rise of the Tomb Raider is set after the events of the reboot. It follows Lara on adventures throughout the globe. The first trailer showed her scouring for treasure in a colder climate.