What Aircraft Will Replace The Boeing 757?

Boeing’s popular 757 is a narrowbody aircraft that was the successor to the trijet 727. The aircraft took its first maiden flight in February 1982, and the first Boeing 757-200 was introduced into service in January 1983. Throughout its production history, according to ch-aviation, 1,218 rolled off the factory floor (including prototypes) to over 50 customers around the world. However, its days are numbered, so what is the most likely replacement?