The episode where Arvind is put in car... didn't show any bad intentions of Aditya. This will be done by someone from Neela's clan... as Neela has already informed that she will put Aryan behind bars and throw Narmada and Arpita out... So quite possible the twist will be where Aryan will be blamed for Arvind's death... (false allegation though) and the Bhaskar time group will be forced to give Imlie an access to all files.
A new villian may emerge...
Aditya being shown as a villain at this stage is meaningless as even if he is shown... the story directly ends as Imlie and Aryan can stay happily together. There is no real villain as of now in the serial and max Neela/Doll do is comic vamp roles. So the real tussle has to continue between Aryan and Imlie only for show to continue.
The actor playing role of Aditya has resigned. So even if painted fully black.. after 2 months... what continuity they can bring to the serial?
yes some filler episodes like Aditya again publishing some crappy news etc will always exist... but all those are meaningless.
Few new folks with strong overpowering personality who will oppose Aryan or Imlie is needed to keep moving the show.
They can also build a track around Malini and her kid and how that influences Imlie again... In original Bengali Serial Malini character gets cancer...
each show has some logical ends... Imlie part 2 should be few years forwarded and all redundant characters may exit.