Typically, the Naagin franchise changes leads every one to two seasons to keep the story fresh. Tejasswi is currently busy with other projects and endorsements. Unless the script demands a continuation of her character's lineage (which is rare), expect a completely new face.
While the makers have not officially announced the cast of Naagin 7, fans are speculating about who might return and who might join the show. Karan Tacker, who played the lead role of Veer in Naagin 5 and Naagin 6, is rumored to be returning as a key character, possibly as a love interest for the new lead naagin. Other actors, such as Rashami Desai and Nandish Sandhu, have also been linked to the show. naagin 7