It has been said in August that Microsoft is publishing it... They can go ahead and restate it every month if they wish, it changes nothing...........Until they finally say: "RoTR will never be on another console!"
Maybe, maybe not. I wouldnt bet against it, nor for it. It doesnt really effect me either way. Typically a game that is published (funded and co-developed) doesnt make it to the opposing platform without working around the contract conditions. As we don't know the conditions its hard for me to say what is going to happen. Its a sure fire thing it will be on Xbox and PC though. And with Sony buying out lifetime on SFV i wouldnt hold it out against MSFT to buyout lifetime of tomb raider if they havent already.
Of course...everything is possible. But TR hasn't been announced for PC, if i'm correct?
But I doubt that MS would now go back to buying extra exclusivity, and pay perhaps even $50-100 miilion for it, when it would have no huge impact on sales. Surely they will get most of their investment back in the first few weeks (not months), with increased console sales, extra marketing during holidays, holiday bundling, royalties on the game without competing platform eating into it.
I doubt MS cares what happens to that game (or any other 3rd party exclusive) 6-9-12 months dow the line (as evidenced by Ryse, DR3 etc.). They certainly don't care enough to waste that much money. The only reason to do it would be to basically troll Sony, and there are surely better and less expensive ways to do it (like giving away Destiny for free on release etc.)
It will be up to the publisher to decide what is best, and TR can certainly shift some PS4 copies down the line to be worth it to port it over...