Yes it sounds like it was planned for a while that he would be the father of Shabnam's child so there has to be a reason for it. I'm not convinced that this doesn't mean he won't permanently leave despite Rakhee's comments. Either way if he doesn't leave permanently I think he will be off for a while. I don't know what this revenge entails but it seems likely to me that Sez is right that he is possibly sectioned due to his actions. I find it hard to come up with any other way in which it would be possible for him to stay past next week!
Edit - just seen the cast list for Monday after the live and he is not in it. Neither is Linda but Mick, Nancy, Shirley and Lee are at the top.