What would you want to see out of another Tom Holland trilogy?
Personally I’d like to see a symbiote saga, ultimately leading to knull being the next big MCU villain. But even without knull I don’t think you can tell that story in just one movie. Similar to how Spider-Man 3 did a bad job showcasing Eddie and Venom. They might even need to give venom a new mcu movie (full recast from tom hardy) so the symbiote could be introduced more naturally.
Maybe also showcase some more street level characters in the first movie. Possibly Black Cat and Kingpin, with Peter teaming up with daredevil finally. They could even connect the X-men and or fantastic four to the symbiote by having either Reed or Beast be researching it.
I’m not entirely sure how any of that would pan out for the MCU but I thought it would be an interesting idea for them to explore. Before they introduce Miles in probably the last of Tom’s movies. It would make it a full circle moment to homecoming while also allowing the prowler to return.