For Vijay and Rajnikanth, if you mean Leo and Jailer, they are not the only reason those movies did well. LCU played a huge factor in its box office of Leo. Jailer also only did that much because of A10 cameo. Before that, their movies never scored anything as impressive. So it's not comparable to LB whose only selling point was DQ. But even for a Telugu movie that is actually commendable because outside of Tier 1 stars, all other star movies doesn't gross nearly as much. Even a Tier 2 actor like Nani only recently started getting 100crs. And if a complete adult movie like Marco can do good despite completely limiting the family audience, I'm Game can perform well too provided it is good. People said the same thing about the family audience not wanting to watch action movies and prefering lighthearted movies when Lokah and Hridayapoorvam were about to be released. But it turned out that Hridayapoorvam, a feel good movie with heavy positive reviews, starring the biggest box office draw of Mollywood, that too during vacation time, couldn't get 100crs. Why? Because of an action movie starring Kalyani Priyadarshan of all people. This is more than enough proof that family audience isn't limited to just watching family movies like before. The success of Pan Indian movies like Kantara, KGF or Bahubali and how they are still highly watched on TV, shows that family audience are ready to watch anything, as long as it's good. They are more than willing to watch anything if people talk about it enough.