The web-slinger, his allies and enemies are an entire universe unto themselves that has only been partially explored on the big screen.
Tom Hardy is also right; Sony has access to a lot of characters, more than enough to fill the release calendar for years to come.
Basically what Tom Hardy is saying is that they don’t need any Marvel crossovers in what he dubs the Venomverse, which, at the moment, is actually more accurate than the Spider-Verse.
That’s part of why Spider-Man excelled on the big screen before cinematic universes were a thing, and that’s why you’re seeing news of all these Spider-Man spinoffs in development at Sony now.