Maybe not with an addon however there are some machinima tools that could probably achieve this. Of course disclosing those here may not be permitted but you can check out this:
http://lmgtfy.com/?q=wow+machinima+tool
And the first result is what may be pertinent to you. I know a lot of machinima directors love this tool and even some of the top end guilds have used this for some of their movie intro work.