They would be using CANON Deadpool, from the comics, not the crazy Origins Deadpool. I am ALL FOR THIS IDEA. GO, RAVEN, GO.
GIANT ETA:
Hi, I'm a Marvel...and I'm a DC: Wolverine (Deadpool) and Watchmen
YAY, FINALLY WE GET DEADPOOL. I think Deadpool & Rorschach is my favorite part. Well, and Deadpool and Dr. Manhattan. Hee.