Imlie is not getting any new hero. She's married to Aditya & will eventually fall in love with him. She's already showing signs with her "Babusaheb ne chhua toh pet mein gudgudi kahe ho rahi hai". And now they are both in Pagdandiya, so they'll have to act like husband-wife, which will again make Imlie feel for Aditya.
No matter how many new male characters enter this show, Aditya will be the only one Imlie will love.
This show is not Mohi 2.0. Mohi was a big flop & Imlie writers don't want to copy that.
Aditya-Imlie are the main pair & it will be their love story only. Theirs is the relationship that will have development with hate, love, angst, passion, yearning & obsession.
Aditya-Malini relationship is already like dead meat. There's no scope for development or even angst. Malini is so perfect that she'll eventually forgive Aditya for hiding his first marriage. What's there to show in that relationship? It's BORING, with no scope for drama whatsoever. Such relationships can't be for the main couple.
There's no need for a new hero. Aditya is the hero & he will redeem himself. It has been only 50 episodes till now. His character will change, like every other Gul show male lead.