The Tamil trailer of the Shahrukh Khan-starrer `Pathaan` will run in `Thalapathy` Vijay`s `Varisu` and Ajit`s `Thunivu` as part of a unique collaboration. Coming as they do from two of Kollywood`s top stars, their movie releases promise an epic box-office clash in Tamil Nadu during the Pongal festival holidays. Earlier in the day, Vijay unveiled the Tamil trailer of `Pathaan` on his social media handle and conveyed his best wishes.

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