Everyone needs to purge from their minds any chance of 1) future Sopranos episodes and 2) a Sopranos Movie. Neither are happening. As for Silvio, he may be on life support, but in the episode they said he wasn't going to regain consciousness. This is an insignificant point. Even if he woke up, he could never lead the family, that was already established two seasons ago when Tony was out of commission; Silvio ended up in the hospital from the stress.

As for a movie, it makes no sense. Tony is dead, but even if he weren't, the show is about rich, deep story arcs, not quick hitting plots that can come and go in 2 hours. On top of that, Chase doesn't need the money so there's no incentive there. Future seasons would yield him bigger bucks personally anyway.

I will give you this, some sort of prequel that involves Tony's dad, Uncle Junior as a young man, Bobby's dad and all the other guys they always referenced in the show would make a helluva 3 or 4 part series. That would be intriguing.

Everyone go re-watch the final episode armed with the knowledge I have imparted to you in this article, and you will appreciate it as a superb series finale.