I wouldn't expect the A346 in ZRH in the foreseeable future. This was a test mission to look the manouvrability at different airports.
As SR won't take over their A346, the chances are low, that we will see it again. Add to that, that chances of other airlines operating it to ZRH are extremely low. The carriers, which ordered it, don't fly with such big equipment to ZRH (AC, LH, VS, ...)
As for MAD. I would expect, that MAD gets a visit, as Iberia are still looking for a B742 replacement.
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment