New Org Chart or Not? Thats the Question

I have to start working at a new company, where I am introducing new people to a mix of people who don’t work well together. They don’t appreciate new managment, and introducing myself, and new employees may cause the mix to get even more heated.The question is, do we introduce us as a shadow team, or a new org chart that just hammers the point home? I am inclined to go with the new org chart and tell people to get over it or get out, but we are close to a deadline and can’t afford a knowledge loss.

Any input?