[kupoartist]

Originally Posted by TtTackler

Solidus must be. He can't be a clone, because in MGS Liquid says Snake and himself were the only embryos kept alive, the rest were 'thrown out'.

It's always possible that Liquid was misguided, in fact it's pretty certain that Ocelot was always leading him on (Ocelot says in the post-credit outro of MGS1 that Liquid believed until his death that he was the "inferior" brother, when the opposite was true). The whole background to his existance may have been taught to him by Ocelot, who's agenda specifically involved covering up the existence of Solidus ("They still don't know about the third brother, Solidus").

Originally Posted by TtTackler

And Solidus looks more like Big Boss than Solid and Liquid do themselves.

That would be grounds to claim that it is Solidus who is the clone, and Solid / Liquid are biological. Natural reproduction isn't quite as good as making you look identical to your father as Cloning is.

Originally Posted by REChick14

Well for those who are wondering who the cloaked women is, it might be Naomi Hunter from MGS1. Naked man presumed to be Big Boss. Baby in Raiden's arms is a toss up between Olga's child and Rosemary so they're not too sure about that.

I think that cloaked woman does look like Naomi... Naked Man... needs to put some clothes on. (Actually, "Naked"? Perhaps that's a specific hint as to who this guy is...).And am I the only one who cannot see this baby that everyone is refering to? Looks to me that he's got a broken arm, not a child. Oh and Meryl got ugly ^^

Originally Posted by REChick14

and Metal Gear AC!D squared, its not two, if you notice the two is raised up.

That's probably just a typographical choice, like Half-Life 2. Even if it is called "Squared", people will stubornly call it "two" anyway.
Edit: The official site refers to it as ""Metal Gear Ac!d 2"" anyway.