In the mid-credits scene for No Way Home, Eddie Brock and Venom have been sucked into the Marvel universe and are getting the lowdown on, well, basically the last couple of decades of the Marvel Cinematic Universe. Before they can actually do anything, they're sucked back into their home universe by Strange's second spell, but a tiny piece of Venom symbiote is left behind.
It's hard to see this as anything other than foreshadowing that a version of Venom will soon have a face down with this version of Spider-Man. The pair last came face-to-face in 2007's Spider-Man 3, the final movie with Tobey Maguire as the webslinger. Venom is one of the most recognisable characters in Spider-Man lore, ranging from an all-out villain to a messy antihero, and introducing him opposite this latest version of Peter Parker could make for one very interesting movie.
Also worth noting: Eddie Brock, while the most famous "host" of the Venom symbiote, isn't the only notable name to bond with it in the comics. Flash Thompson, aka Peter's school rival, also has a comics arc involving his connection with Venom.