Re: Swarm + newspaper combine?
There's no reason it would not work.
The only down side is that you have no idea of the viability of the swarm queen, or a 100% guarantee that she is alive and well in the swarm. I would want to keep the swarm in a separate box for a week or two and make sure I have a good laying queen before pinching the other one.
You could put the swarm in a box on top of your existing colony with a double screen board between them along with an upper entrance for the swarm. Evaluate in a couple weeks and then decide which queen to pinch. Give them a day and then do your newspaper combine.
To everything there is a season....