I can't remember who came up with it but I read an awesome hypothesis at one point that 4.5 was D'Anna's crazy dying dream post-4x11... ;)

I think your idea is interesting, though I'm not entirely sure how it would work; but then, my theory involves the hybrids jumping through realities and changing them and the Old Hybrid from Razor being the weird, secret puppetmaster, so I'm not really one to talk. ;)