This excellent article is more theoretical. I haven't seen a timetable, although I know that the next thing that happens is that the translation goes to Rome for approval. I don't think that will take long!
After that, I guess it's a matter of printing up new materials for the parishes, getting rid of some musical settings that will no longer work (yay!), etc. I bet some bishops will find a way to really drag their heels on this. However, the changes really aren't major, so I think it's going to be hard for them to find an excuse for this. And once the new missals (or missalettes) are out, I guess they'll just have to do it.
What's that dreadful sound?
It's Marty Haugen's Mass again.
Have mercy on us!
Can't we stop that sound?
And not hear Marty's Mass again?
Grant us some peace!"
Society for a Moratorium on the Music of Marty Haugen and David Haas