So. Okay. Lets see. Heavy SPOILERS here, ya'll been warned already.
In 2.0 we get this footage of 2nd Impact:
We see four crazy cats, abstractly rendered, with halos, red eyes, and what appear to be cores. Two have cores in their chests, another has a core with a circle around it, and the final one either has a core in its forehead or three eyes in a triangular configuration.
So... yeah. Neat. I'm thinking maybe we already know who three of these Lilin+/Adams things are (I believe this is how they're referred to in the 1.0 outro?).
And maybe, just maybe?
Rei-Shinji merged in Unit-01
So... Rei and Shinji together unshackle Unit-01? Don't know. But since Eva is all about obsessing over symbolism that might have been conceived by Anno arbitrarily after a 3-day, 11th hour bender, I figured it'd be worth something to point this all out.
cough Screencaps not mine. /cough