Tamil director Mari Selvaraj, who is known for films like 'Pariyerum Perumal, 'Karnan' and 'Maamannan', hinted at a possible collaboration with Superstar Rajinikanth. In 'Vaazhai', which is gearing up for a release on August 23, the protagonist Sivanaindhaan is a fan of Rajinikanth, while his friend Sekar is a Kamal Haasan's fan. Here's the trailer: On the work front, Rajinikanth …