Did the monkey purposely take blood, or did it just scratch Regina? Also, remember, WWW was already in the castle before they even knew someone was there, and I don't think she would have spent x-amount of time she had been there wasting it on looking around everything except the magically locked door. Besides, even if the blood was taken purposely, it would take a lot long to make a proper potion to break the spell (plus I think 'Gina said that it wasn't possible anyway, I'm sure it's more than just carrying a little bit of someone's blood...).
Remember there's a lot about Cora we don't know. We know she's Regina's mother, we know she somehow became the Red Queen in Wonderland, we know she had some kind of relationship with Rumplestiltskin both before she ended up with Henry Sr and before Regina was born. And I think it's safe to say it ended before Regina was conceived (could be around the same time but I can't be sure). I get the feeling we would have found out by now if Bae and 'Gina were related (I mean this show loves crazy families, how crazy would the fact that Regina was actually Henry Jr's aunt by blood? Seriously~ Though since the whole "depressed because I can't truly be with my son thing" may play a role I kind of doubt it.
As for evil for the sake of evil, what was Cora doing? She didn't have any real backstory other then "stupid princess tripped me, she must die! And her family must suffer! I'm evil!" WWW seems to be going along the lines of "Mother never loved me, I'm jealous, I must kill/hurt/destroy you!" I think that she might be Cora's daughter... Alternatively, Cora in disguise because she's not really dead, or some random chick who got hurt by Regina in the past and is exacting revenge now... x3.
As for Rumple (oh how I love him
my two favorite men back in action (maybe, still need to watch ep-3) I'm glad he's back. I was so anxious that he wouldn't be... Now that he's back I do kind of wish they had waited, but I would never be able to handle it if I wasn't 100% without a doubt positive he would come back.. .And I hate spoilers so I would have to wait, biting my nails praying we'd see him...
Plusplusplus!!! Why would our WWW want to keep Rumple in a cage if they didn't somehow have some kind of past, hmmm? She's totally his and Cora's absolutely disgusting freaky love child *shudders*.
Unless ep-3 disproves this.