I doubt it will ever completely revert, but I honestly wouldn't be surprised if they started adding more elements from the old continuity as it goes on. I wouldn't be at all if in another 5 or 10 years, the New 52 is pretty close to what we had before.
I think that is exactly what will happen.
In 5 years, they will have enough "new" fans of the "new" continuity, why would they revert?
Why would they revert... ever? In two or three years, who is still going to care about the "old" continuity? Maybe a vocal minority... but who cares?