As per story ragini is alive can comeback.
For god sake now makers should not bring vivaan alive from dead, no flashback story nothing. Let his soul be at peace somewhere else. He had the most evil fate since childhood, his fate or journey is not suited for azaadganz. He was the real bandhua widout stamp all these years.
Now don't want his death by gumaan revelation to anyone, makes no sense to story at this point, let it be forgotten like vivaan and sukor forgot mystery women. Otherwise this revelation has no benefit to sukor (chakor understands it was accident, she is not guilty), only if imli is alive she will again feel sorry for blaming chakor and turn little positive only to turn negative on drop of a hat again for lame reasons.