Hard to say if they will really connect with an audience. Both movies look like mid-level Marvel films. Honestly, both trailers remind me of Green Lantern. They present heroes who get a pass because they are played by actors with charisma, but otherwise they aren’t actually very heroic or even seem like good people.
Aquaman is a little weird because of his super-strength. I don’t think general audiences really are aware that he has super-strength in the comics, but he’s exceedingly strong even on land in the trailer. He even seems stronger than Wonder Woman was. And I doubt they can rely on Justice League for a good introduction to the character.
Shazam, on the other hand, doesn’t seem as strong as he is in the comics. He’s kinda at Luke Cage level in the trailer so maybe it depends on him believing in himself or something. It is a bit of BIG meets GREATEST AMERICAN HERO.
I think the fact that Simon has such a debilitating disease AND also reacts with believable negativity to that fact sets him apart from Superman and Shazam. You could compare him to Captain Marvel Jr. for that. Naturally, what makes Superior different from both is that the powers are absolutely not part of any heroic plan or purpose. They turn out to be quite the opposite, and overcoming that - finally giving up the desire for those powers - is the solution to the story’s conflicts.