Ajay Devgn reprises his role as Vijay Salgaonkar in the upcoming film.'Drishyam The Conclusion' is presented as the final installment of the Hindi franchise.The movie's first look poster shows Vijay looking tense through a window.Jaideep Ahlawat joins the cast as SP Rajveer Singh Tomar, investigating the case.Tabu and Sriya Saran also return for the film…