And therein lies the problem: there shouldn't be a need for a game to explain everything that happened between Liberty and Patriots - it should have already been explained and explored.
I still don't disagree but it's pretty clear that Hideo Kojima doesn't care about conventions. Also, I'd rather play through the explanation rather than have it explained to me, so I'm more than happy for there to be a game to fill that gap. It's like he's treating the entire Metal Gear Solid franchise like it's a Quentin Tarantino film as well as a typical Japanese franchise; tell the story in a completely random, non-linear fashion whilst also milking it for all it's worth. Luckily that latter part hasn't impinged on the quality of the games to the usual extent (by which I mean compare, for example, the best Resident Evil games to the worst Resident Evil games then compare the best MGS to the worst MGS) so I'm kind of ok with how the story is being told, except for the somewhat jarring retcons... MGS4 was the worst for that but I can sort of forgive it as it was supposed to be his last MGS as director, and as much of a cop-out as I felt it was, the nanomachines thing wasn't entirely unrealistic.
Also, Darren, that explanation is all well and good as a brief overview but what did
Snake do, then? There's a five year gap between MGS2 and 4. What was Ocelot/Liquid Ocelot/Liquid doing? What happened directly after RAY dived off of Arsenal Gear? Did Snake just sort of go 'hang on a sec, that thing swims pretty damn fast...' then wait to get picked up? What about the rise of the PMCs and the SOP system? It was just abruptly introduced with no real backstory in MGS4.
Hopefully this game is set either just after MGS or MGS2, but as all the evidence (eyepatch, MSF emblem, FN FNC) seems to point to it being Big Boss that doesn't seem likely. It could all be a big bait-and-switch, though, and it wouldn't be the first time. Whatever it is I can't wait to see some gameplay!