Cregg was a character on the political TV show 'The West Wing'. I didn't think her mom was a real 'mystery'; I just thought she was dead.
My guess for the pool of light is the finale of the TV show 'Lost'; there was a glowing pool with some kind of artifact in it(?).
I think Doom has the fake, and Black Cat has the legit painting?So, does Doom have the fake or real painting now?