One thing we can take into consideration is that I am sure Square wants to continue the Tomb Raider games and the PS4 userbase has reach a number which is very hard to ignore.
So the question of whether ROTTR will ever release for PS4 after a temp contract would find the above as a point in favor if Square would see trouble releasing another sequel to the TR franchise without giving PS4 gamers the previous game to follow the story. Maybe they may consider the fact that those users may feel left behind in the story and may opt not to play the next one.
But then you have franchise sequels that have landed in platforms without the previous iterations, like Dead Rising 2, Portal 2and The Witcher 3 so who knows if Square will even mind.
But if they do mind, then I guess we will even see a contract for Micro of very short duration and a prompt release for PS4 after some months. Maybe.
Nintendo is selling their IPs to Microsoft and this is true because:
http://gamrconnect.vgchartz.com/thread.php?id=221391&page=1
