You're fucking well coming whether you want to or not.
The above sentence seems to be an order. But why use the present progressive tense?
You are coming (tomorrow).
This is the Present Progressive used for something that has been arranged for the future. If said emphatically, it shows the speaker's insistence on the actualisation of the situation - i.e. it has the strength of an order.
The same can happen with You will come and You are going to come.
The f***ing well simply strengthens the emphasis.