Rabbit behavior and bonding?

For close to 2 months now I've had this rabbit (Remi) I found that someone in my area just let loose. Just a few days ago I found another one, I'm sure they both came from the same place. When Remi first saw this new rabbit (I'm calling whitey for now until we come up with a name) he acted very aggressively. They are both in my bedroom because we can't really put them anywhere else at the moment. We took both cages outside and put them on the lawn next to each other for a few hours. when we brought them in we let Remi get out and at first he was biting at the cage Whitey was in, I flicked water on him when or before he would start biting the cage. Soon after having water flicked at him he started dancing and running around the cage, and then laying by the cage on his side and rolling on his back. This other rabbit Whitey is also a male and very submissive. What I want to know is how will I know when it is a good time to them both out and start interacting with each other? Would Remi be ready now to play with the other rabbit given his behavior (dancing, laying/rolling around the new rabbits cage)