I hope he does get signed again, but only after if and when he's healed properly and is ready to play. Why take up a roster spot and pay someone who was re-injured trying out for another team?
I don't think there is anything to worry about because I doubt the Battery would sign a player until they knew he could play. I have heard a rumor that there was a complication from the first surgery.
Before or after, he went to Israel, the day after he was cleared by the doctors to start light training?