Gautham Menon is reported to have said that when he narrated the one-liner of Yohan Adhyayam Ondru, Vijay liked it so much that he gave his go-ahead. But when he completed the script, the star felt that he was not cut-out for the role and requested the director to make some changes.
Since Gautham was not willing to go in for the changes and Vijay had no time to wait as AL Vijay was ready with a script for him, he decided to move over to that project.
That is the reason behind Yohan getting dropped, revealed Gautham Menon.