I'm thinking Spider-Man at #1. I think the original trilogy had some records back in the day, and the fan base should be pretty riled up.
I reluctantly picked Justice League for #2 as I think the DC brands still carry some cache. Plus, if WW is reviewed well, that might give JL enough buzz. I think the movie being terrible will only hurt it but so much. BvS was bad, but a good film buffering between the trash piles might make people forget that JL will be more like BvS.
With Wonder Woman getting good reviews, I feel really good about my picks.
WW will do good, and from what I heard, it will deserve to do better than it likely will, but I seriously doubt it tops Guardians or Spider-man for the year.
I think it doing well, may actually give a small boost to JL, which will also surpass WW (even though WW might be the better movie.... we'll have to wait an see)
It's current standing from the estimates I've seen put it somewhere around $600M -$700M World Wide depending on dem legs
GotG2 is at $818M+ already, but won't likely make it past $860M (assuming it's out in all territories)
Spider-man will do no less than $750M
and I'm sure even Thor 3 will break $700M
and for reference, since I'm sure no one here checks on WW gross BO.
Logan = $612M
Lego Batman = $310M
Power Ranger = $140M
So Wonder Woman looks to hit the Top 5 for the year and possibly even the Top 4 if it way over performs due to extremely long legs. But that also depends on how JL and Thor3 both perform.
I think GotG2 set the bar, and SM is likely to meet and/or surpass it.