Will all of the Big 3 survive next generation?

[NintendoPie]

Kresnik said:

Bad example because it's so long ago, but Sony used to release some of their titles for other systems.

Cases in point: WipEout 2097 (Sega Saturn, PC), G-Police (PC), Twisted Metal 2 (PC), Jet Moto (PC).

I agree it's probably well past that stage now, but I could see Sony as a third-party developer.  They've certainly got the studio roster for it.  Whether they'd do it anymore or simply sell off their studios is another matter.

I could totally see Nintendo or Sony as just Game Developers too but it just won't happen.

They don't, or at least Nintendo, want to have less control over their company. Making games for another would do that.