I'm going to list what I think could have been some of the possible outcomes for The Sopranos ending.

1. Tony Soprano gets shot, but not his family.
2. Tony Soprano along with his family gets shot.
3. Tony Soprano's family gets shot, but not him.
4. Meadow walks into the bullet taking the hit instead of Tony.
5. Hitman attempts to shoot Tony, but misses, and Tony pulls out a gun and shoots the Hitman.
6. Someone in Tony's crew, Paulie for example, was aware of the hit and got to the restaurant just in time to prevent the shooting.
7. Nothing happens. No one gets shot.

If it were up to me, I would've chosen #5 for the outcome. Actually that's how I would've started off a Sopranos movie.