ATR42 - I followed this all closely, and do not remember Stelios ever proposing Geneva Zurich. What did indeed happen was that TEA (partly or completely owned by Migros/Hotelplan) proposed to do it and charge CHF 99.- return about 10 years ago. SR had the right to approve, and did not, but promised to (1) lower the price and (2) improve the service, but did neither. The first "shuttle" announcement actually had one less flight than there was previously. The prices went up. Business Class was moved from 5 seats across to 6 on the A32x.
I don't know whether any remnant of TEA still exists.
Momo