Ajith is currently shooting for Vishnuvardhan's untitled film for producer A M Ratnam.
Ajith will start Siva's film only after he completes Vishnu's film, by the end of December.
But there is much excitement among Ajith fans, for this will be his 53rd film. Vetri Kondaan will have the hot and happening Anushka as its heroine.
Siva had narrated a one-line story to the star and he is said to have been impressed by it.
There were rumours that the film is a remake of Ravi Teja's Telugu hit, Daruvu, but the director has denied it.
"Ajith sir's film will be a mass entertainer and it is a new script, not the remake of Daruvu," said Siva. "It will have all the elements that his fans are looking for."