Why AIADMK got afraid of actor Vishal.

Why AIADMK got afraid of actor Vishal who try to contest in RK Nagar by election.

The reasons are: 

1. DMK behind on him,
2. Votes should not be scattered
3. Other parties did not discern
4. He's having big image as an actor so people will support,
5. ADMK Only grooved up him, but now he's doing opposite reaction