But having watched Ekta Kapoor's shows almost a decade, I can confirm that IshRa will not separate for a long time (maybe few episodes for KP's holidays). And, IshRa divorce isn't even a possibility.
WHY? Simply because Ekta's shows' leads don't divorce before they consummate their marriage. During Mani track same news came to media but nothing has happened. Makers very well know without IshRa/DivAn together, this show won't survive.
This Subbu track might seem testing time for Raman but I think it will be otherwise. It will be test of Ishita as a wife, she might get carried away initially as Subbu will assure her to bring Ruhi back. Eventually the wife Ishita will realize Subbu's trick and bring back her love, Raman.
1