Tomb Raider 2 was never announced for PS4, let announced as multiplat by Square Enix. Even at the end of the Rise of the Tomb Raider E3 trailer at MS's conference, you saw the green logo of Xbox One, which is usually reserved for exclusives (of course that does not count as official announcements, but it sort of acts as an indicator). The only official Square Enix comment was that a Tomb Raider sequel was under development for ''next-generation consoles''. This does not necessarily mean they were also working on a PS4 version, it can also mean that they are not ready to announce the platforms they are working on. For example, Remedy announced they were working on a project for ''next-generation consoles'', though that project turned out to be Quantum Break. Though I do think they should have just announced it then at their e3 that it was exclusive instead of waiting at gamescom and got some people worked up.
https://www.youtube.com/watch?v=XsV4E0JUlsw
You can see the Xbox logo at 1:07:00
