Nothing extreme gonna happen. Serials and movies mein its usually shown that ram ke ghar raavan paida hota hai and raavan ke ghar ram. Ansh was already raavan so his son has to prove karan parvarish is bigger than ansh blood. He might be misunderstood by tulsi just like how she was skeptical of eklavya in S1 gen 3 but overall I think he will turn to be decent person.
Vaishnavi se it might be forced or marriage of convenience but it will later turn into love. Parth and Vaishnavi don't have scope. It looks nothing more than infatuation.

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