I think probably we will see Remco at the Giro. About the swiss stage i don't think they will climb Nufenpass or Gottardo because i have heard that it would be a total Ticino stage. For me they will climb Cari two times or other ticino climbs. This climb Motta di Gribbio is very interesting and it would be a good option.
Start in Bellinzona, 30 km flat until start of Motta di Gribbio (from south) then two loops with Motta di Gribbio and Cari. Only 110-115 km, but 3900 meters of climbing and basically not a flat meter in the last 80 kilometers. Would've been really cool, but a 115 km mountain stage with two loops doesnt sound much like a Giro stage to me. Maybe if it was ASO.
In an unrealistic dreamworld:
Do these two loops of Gribbio+Cari and then after second Cari descend once again and then finish on Gotthardpass (155km, 5300m climbing) or take Gotthardpass and Furkapass before descending into finish to Goms/Ulrichen (200km, 6300m of climbing).