The success of Venom also gets rid of the main negative of the Sony/Marvel deal which was that at best Sony was only going to be able to make a Spider-Man film every two years. Now with the success of Venom they can (depending on audience reception of other films of course) put out a superhero film every year while also keep Spider-Man being tied into the MCU.
This all could change if Far From Home underperforms of course (which btw I've seen some predictions for that film to gross less than Homecoming which idk why that would happen).