Bro if Salman and HR actually come together (I don't think they will), and it looks like the movie is worth that pairing, then we can easily see 70+ opening day on holiday. Yes the potential to top BB2 footfalls is there. But the problem is, this will again be a glossy stylish action movie, and Bollywood does not have directors who can nail those type of movies. Even War for all it's hype won't go much past 2.5cr footfalls in best case too. But yeah, if you can get someone like A R Murugadoss to direct it, phir aag lag sakti hai.
Then coming to Dhoom 4, well it's still the biggest franchise in Bollywood, but D3 did weaken it a bit. Now SRK himself is also in a really bad phase. But all that movie needs to do is look excellent in promos, and it'll take huge initials at least. One interesting thing could be, just to make it a proper universe, bring in SRK as Don, not some random new thief. I know Don is mostly a multiplex franchise, but just that hype and excitement will see the movie go bonkers.
And the SRU (Shitty Remake Universe), well, that franchise has 2 things the other 2 do not. It has characters, not actors. See, you don't actually have fans of Tiger or Kabir, you have fans of Salman and HR, but with Singham people actually love that character. Of course Ajay is the reason, but that character is recognisable as being separate from his actor. Now Simmba didn't really get that type of fan following, but is Sooryavanshi manages to, then it wouldn't just be beloved actors coming together, but beloved characters coming together, and that is it's USP. The other thing is of course RS, he truly understands his audience and will be sure to make something that they really like. Here we don't have the drawback of not having a strong enough director.
My ranking potential wise:
and this can change, if Sooryavanshi (the character, not necessarily the movie), is loved by the audience.