Very doubtful of most of those Sony rumors. Only ones I see happening are Planetside and the PS+ thing. I could see Last Guardian happening though, so what's keeping me doubtful on that front is mostly pessimism.
I'm still not convinced Versus is becoming XV, and if it is I doubt it will remain exclusive. Kingdom Hearts thing doesn't sound wildly far-fetched, but I wouldn't be surprised if there was a PS3 SKU as well if it's just another HD remake. And I don't think Demon's Souls 2 is ever happening. If it did, I doubt From would be involved anyway, at which point I'd be annoyed at Sony riding their coattails after shitting on the original.
Xbox One stuff sounds super underwhelming, so it's probably true.
As for Nintendo, I do think they're going to show the Wii U Mario game. If they don't I'll be really disappointed.