The deep flexibility you'll have today doesn't come around very often, and it's here now for a very good reason: you are going to need it! Don't be too dogmatic about your plans, no matter how long they took you to put together and how perfect you think they are. If other people are going to be involved, then other people need to have some input too. It might not make you overjoyed to have to modify your vision, but in the end you will be better off for it.