Displaying threads with an alternative PAGE_CONTAINER template

I need to display specific threads below articles in WordPress using an iframe. So basically I need a way show the threads with an alternative PAGE_CONTAINER template, preferably by adding a query string to the url.

Can someone give me a push in the right direction for doing this?
Thanks alot. I'll give it a try.

Using a query string ( ?removedesign ) and setting robots noindex seems like a somewhat clean way to do it. The alternative would be a new route I guess
Does anyone know if listening to some controller and watching for a query string to replace the container would screw up caching? Guess I might have to use routes after all.

Any input on the best way to get a create a clean thread view for iframes would be great