In today's Action Comics #14, Superman finds himself face to face with a mutltitude of angels.
But these aren't exactly the heavenly type, working for God and all that. Rather, Superman explains in the issue that "It's not a race of beings. The Multitude is all one thing--a single weapon with countless points aimed at us from a higher, fifth dimension."
Of course, Mr. Mxyzptlk, a classic Superman villain who seemed to be hinted at in Action Comics #0, hails from such a dimension.
Given that Morrison has used angels in his work before--most notably in his run on JLA--it may also be interesting to see whether this story could lead to the reintroduction of Zauriel to the DC Universe.