We understand that for Facebook to review apps, the app needs full functionality to be able to demonstrate the permissions needed through App Review.
In our case, we haven't started developing the app yet. Is there a way to contact the review team, explain our intended usage for the specific permission, know in advance that the app will pass, so that we can start programming knowing that when we will post for review, the app wont get rejected.
This could save a lot of time because If the App wont get accepted, the whole project can't continue.
Rather than rely on Facebook to give you an answer on your intended application flow and use of permissions (without Facebook being able to test and verify), you should consult the Platform Policy, Permissions and App Review documentation to see whether your idea or application is:
If you app doesn't follow the policy and permission guidelines, you can be sure that Facebook will reject your app and won't grant you the required permissions. The documentation on Permissions is in particular useful to see where / when you are allowed to request such permission, and how it should be used.
If you can't justify why you need a particular permission, you won't get access to it.
Facebook will still need to use the application and see how it works before permissions are granted.
Some additional tips on passing the review process can be found on my blog.