What do you think which of the shelved Swiss route will be operated with another airline?
I think, that routes out of Zurich to: Göteborg, Salzburg, Tirana and Sarajevo have enough traffic and will be overtaken by another airline...
ZRH-SZG: Air A!ps (maybe in cooperation with Swiss like on ZRH-LNZ)
ZRH-SJJ: Air Bosna with a few weekly scheduled flights, maybe airlines like Odette Airways, (Alpstein Air), (Eurojet Geneva) could start some weekly charters
ZRH-TIA: Albanian Airlines or again the charter carriers mentioned above
ZRH-GOT: City Airline
ZRH-TLS: Air Jet
ZRH-DRS: Cirrus Airlines
GVA-THF: City-Air, European Air Express
Swiss aviation news junkie living all over the place
I think that City Airline is the only airline (perhaps besides Skyways but is't unlikely) that could operate this route. OTOH, rumors say that CF haven't done great lately and they shelved LGW ops early February to base another ERJ-135 in the UK in cooperation with Eastern Airways. ZRH has never been included in their future destinations and without Swiss' connections at ZRH I don't see that much potential for this route.
Just like birdwatching - without having to be so damned quiet!