A couple of days ago saw it rumored that Spider-Man will be appearing in the upcoming Tom Hardy Venom movie.
The rumor surfaced as reportedly Tom Holland was spotted on the set of Venom for two days.
“Tom Holland was on set filming scenes on Venom for at least two days as Peter Parker," Jon Schnepp said on YouTube. "Ok, so I’m not saying that Spider-Man is in the film. When I say that Tom Holland’s Spider-Man is in the film, I’m saying ‘Peter Parker is in the film. This is a cameo. I don’t know what it is. I didn’t read the script.”
Regardless if it is Tom Holland as Peter Parker, Tom Holland as Spider-Man, or even both characters appearing in Venom, if the cameo holds true then that confirms that Tom Hardy and Venom are a part of the Tom Holland Spider-Man universe and vice versa.
Now regarding whether or not Venom is in the MCU remains to be seen. As I previously pointed out, Sony could simply ignore mention of anything MCU--as could Marvel regarding Sony's Spiderverse (it would be sort of similar to Marvel TV and Marvel Studios, as the two are separate companies).
If it does happen, it is a cool nod to the fans, and with the X-Men and Fantastic Four returning to Marvel--basically that means all the characters are now back at the House of Ideas. Just imagine the possibilities down the road?
Venom has an October 5, 2018 release date directed by Ruben Fleischer also starring Jenny Slate, Michelle Williams, Scott Haze and Riz Ahmed.