If they swap the grooms.......well, then it would be an exact reversal of CB1. From the article, it says, Radhika comes with Dev to Mathura. Just that.......and not a single mention of Marriage in that line.
Also, they are saying that Dev meets Rads when he is asked to go and see the bride selected for Rohan. But Dev and Rads meet in Mathura coll right? And he is even supposed to propose her on Holi! 😕 I am confused now really.