After the success of the first Venom, a Marvel Cinematic Universe crossover was teased with a post-credit scene from the sequel Venom: Let There Be Carnage. It’s unclear if this means Eddie Brock will first appear in No Way Home or if Marvel and Sony are saving his meeting with Peter Parker for the next big movie.
As Feige explained to Collider, he was impressed with the positive response from fans for the first Venom, and given the character’s comic book history with Spider-Man, he knew that now was the time to make these characters meet. He goes onto say :
“You look at the obvious comic connotations between Venom and Spider-Man and it is inherent. So the minute Sony made their Venom movie and it worked as well as it did, and Tom Hardy became as iconic as he has become as Venom, then the obvious question is then, ‘How do we start to merge them?'”via Collider
Something which might work against Venom showing up in Spider-Man: No Way Home is that the movie only seems to be bringing in the supervillains who’ve perished fighting Spider-Man. Tom Hardy’s Venom has not even met Peter Parker or Spider-Man, so if he’s involved, it may not be for a confrontation with Spidey. With that said, his inclusion in the movie is still definitely possible.
There are also reports of Tom Holland starring in another trio of movies as Spider-Man following the release of No Way Home. There have also been rumors of the Sinister Six banding together on the big screen to take on Spider-Man and that’s another possible direction Holland’s next trilogy could find itself heading toward.