EPIC is not enough to describe the scene at Central HQ Gate, Ling really had quite the shock to let Greed take such control over his body ... or merging with him...
The bastard scientins found quite a way to force Roy to do a human trasnmutation, but if Riza really is dead then there is no reason for Roy to try to resurrect her since he already knows from Ed and Al that it doesn't work. If roy really tries it, then it is either sheer desperation or an attempt to heal a fatal wound before she dies.
The other worrisome part is Al: He does not respond after being transmutated into the original Homunculus lair and makes you wonder if his soul is still attached to the armor. Judging from what just happened to Riza, i'm starting to fear that he won't make it until the end ...