That all sounds good, but it doesn't sound like Batman VS Superman, more JL vs Superman. And the focus on Superman is not there.
Then again, it could be.
In order for my idea to work, I'm gonna make 4 assumptions.
1. The film makers will deny that the JL are in this film, or will say 'it is NOT the Justice League' instead.
2. Even though WW (and possibly the Flash) will be in this film, they will not 'look' as their comic counterparts (will be explained).
3. There will be one 'origin' in this film, but it will not involve any of the heroes mentioned.
4. Goyer has said Superman was the 1st superhero, everybody else follows. But Batman is a grizzled veteran. So maybe Superman is the first 'public' superhero, that exposes the hidden world?
So, how does this film become BvS, a MOS sequel with a focus on Superman?
A. Following on from MOS, Batman views the so-called Superman a threat - an alien being capable of mass destruction, who's race tried to destroy the Earth, and has also killed? On top of that, this 'Superman' has gone public, showing himself to the world. This alien must be stopped.
2. Batman has a team/associates who will help take down Superman - WW and the Flash. However, they work by being covert / undercover, wearing clothes to match (Batman would be the same, there would be no Scarlet Speedster, just black, and WW? Think Donna Troy).
Batman with a team - NOT the JL.
A covert team, of outcasts.
Of different people from everyone else.
A team of Outsiders.
3. Superman has to take on this team of heroes, earning their trust. At the same time, he has to argue about his philosophy of using his abilities (from MOS) - rather than helping the world in the shadows, SHOW the world who you are.
4. At the same time, we have the emergence of the true villain - (Doomsday) something unstoppable. Something that will destroy us all.
Something that can only be stopped by a Superman....
Yes, it's cheesy. But that's a storyline that could fit all these characters/plot points.