I read a news article which says that Rajat will soon be back as Chandragupta Maurya. Here is the article-
When Imagine TV's Chandragupta Maurya shut shop in 2012, speculations were rife that the show will soon be aired on Sony Entertainment Television. However, with lead actor Ashish Sharma's exit, the rumours soon died down.
Now if reliable sources are to be believed Balaji Telefilms' is planning to bring a new show on the life of Chadragupta Maurya.
Sources inform that small screen's Akbar, Rajat Tokas has been roped in to play the lead role of Chandragupta Maurya and casting for the rest of the actors will begin after Hindu festival Navratri.
Source-times of India
http://timesofindia.indiatimes.com/tv/news/hindi/Rajat-Tokas-to-return-to-TV/articleshow/49229781.cms