If you knew villain at all, I think a reraise was in order. If he made a habit of opening with that kind of hand, you should pop him all day long. Without reads, I think (and I'm no omaha expert) I still reraise most of the time, but flatting isn't bad.
Obviously the postflop is standard.
was a Rush game, so no reads. Villain has opened with a pretty standard hand. Because I didn't raise preflop, I don't think the villain can put me on A-A, probably thinks I have a similar hand to him, in other words, I'm still on the draw after the flop.