But even if you read like the Bungie mailsack or breaking in, you get the feeling they are heavily leaning for PS4.
All the devs were once asked, what games are they excited to play for next gen. Almost all were saying things like Infamous Second Son, Knack, Killzone, things like Kingdom Hearts 3, while a few did say Battlefield etc.
I just think they have a sour taste in their mouth because of MS and want to fully embrace Sony and their fans because they really need to show them why Bungie is a great studio.
Who knows, maybe they're hedging bets, I mean look how many Halo and Xbox fans are going ps4 next gen. Even the 180 on drm, online isn't bringing them back. Could be for nothing and we see them talk about exclusive Xbone content later near release. Plus they did say something about how their Halo fans might be rewarded.