My thoughts about JR track:
(1) Siddharth goes to rescue DD and on the other side Roshni makes Resham Chachi wear the bridal attire and goes behind sid to help DD too...
(2) Yash comes to know about Roshni's escape...he also watches from the camera that sid is rescuing DD...knowing that its not roshni in the bridal dress, he blackmails sid to choose between DD and Roshni (Sid thinks resham is roshni)
(3) Sid confused between his love and his sasumom (He chooses Roshni)
(4) Roshni reaches at the moment Sid decides to be with Roshni than to save DD
(5) DD dies in front of Roshni's eyes and Roshni slaps siddharth
(6) Yash is arrested again (For DD's death)
(7) Roshni unable to forgive sid and parts ways from him and goes in a foreign country where sid will not be able to trace her
(8) Leap happens...shows siddharth looking for roshni every corner of the world
And some similar tracts like what happen during Bangkok episodes...sid pacifying roshni etc ...love, romance, compassion, obsession etc...