You can follow our posts on Superman at this link, and our posts on the new movie, Superman (2025) at this link.
We have Superman (2025) on the way, which means a whole new, very specific wave of merch will roll out from now until, likely, next Christmas.
In a general sense, *some* Superhero nerds will buy almost anything with the right logo or image on it. T-shirts, sure. But I've had toothbrushes, picture frames, piggy banks, rubber ducks... I'd feel worse about this, but I also follow sports, and, friends, there is *nothing* you cannot buy that doesn't come with a Cubs logo slapped across it. The point being, one will find a wide array of items featuring superheroes, and for a bit, this will feature the Superman movie-specific license.
Back in 2001, I remember my own brother, Steanso, saying to me "if I put a Superman sticker on a pile of dog@#$%, I think you'd buy it." And that has haunted me ever since. But he's not too far off when it comes to how far DC and Marvel will go in letting just about anyone license DC and Marvel art to slap on a product.
And, since Zazzle showed up 20+ years ago, DC in particular, has been pretty free with "yeah, here's some clip art. Go nuts." And a lot of their imagery has just been out there, with Superman logos showing up on anything you can imagine.
The onslaught of super-product can be overwhelming, and it does not help that some people don't bother to get the license.