The European teams definitely would favor a new early season speed event on their side of the Atlantic - anything to save money and time. Given the critical mass of the Euro squads vis-a-vis the U.S., Canada, New Zealand, Japan, et al, they'll likely throw considerable support behind the Zermatt-Cervinia idea.
It costs a lot to locate a team and their support crew on another continent. Copper's venue is great in that it can handle multiple teams at a time (and overflow can go to Breckenridge, Keystone, Loveland, and Aspen without much hassle). But it's a big logistical undertaking, and many athletes prefer to sleep in their own beds and not travel to extremes. USST and CAST have adjusted to things by renting apartments in Europe to create a "home base" setup for the majority of the season, but it's still not the same as being at home with all the creature comforts.
So if this means that teams from France, Spain, Austria, Switzerland, Norway, Sweden, Germany, Liechtenstein, Belgium, Slovakia, Slovenia, Croatia, Andorra, Poland, and the like can shorten (or even eliminate) travel to North America they'd likely jump at the chance. The FIS has already done a de facto elimination of the formerly traditional spring swing through North America, and has mostly disqualified new World Cup venues outside of Europe by wanting to cluster multiple disciplines per venue - i.e. you won't see single day/single discipline stops in North America like you see in Europe (e.g. Schladming and Flachau night slaloms). They make a decent business argument for it in terms of projected attendance (tho Killington's events attract huge crowds, and Park City's "America's Opening" events always drew big crowds due to their accessible venue).
Nyman has a somewhat salient point about having a challenging speed block at the beginning of the season, but not every early DH has been a "cakewalk" style event. He also sells Birds of Prey a bit short (sure, it's not the hardest DH on the circuit, but it's technically demanding). Lake Louise is certainly an easy entry into speed in the early winter.
It's most telling that the Zermatt-Cervinia venue touts its high elevation as being resistant to climate change. High altitudes will help - and will add challenge given the lower oxygen content. But this also points out the low elevations of many legacy venues, most of which have challenges making or retaining snow. The North American venues currently on the circuit are more climate change resistant due to a combination of elevation (Beaver Creek), latitude (Lake Louise), or state-of-the-art snowmaking (Killington). They also handle multiple races in one stop, and all can be up and running early in the season.
This early season requirement has basically quashed any possibility of many former venues holding World Cups again unless things change within FIS. Looking at some of the old guard venues:
- Whistler's snowpack is more reliable in February, March, or April than in November or December (read: not likely to host World Cups again).
- Park City isn't likely to host World Cups again until SLC lands another Olympic bid (and they also have a competing venue being built at Utah Olympic Park next to the bob/luge track and the jumps for nordic and freestyle - these SL, GS, freeride, and mogul trails will be competition use only).
- Snowbasin is in the same boat as Park City and would also need some infrastructure reinstalled (e.g. A nets) and their tracks re-homologated.
- Canmore/Nakiska is a great CAST training venue but is unlikely to hold World Cups unless Calgary lands the Olympics again.
- Lake Placid's speed tracks are woefully outdated (if you think Lake Louise's track is a glider's paradise...), and all of their racing trails are located above the base area and hard to access for spectators (also, snow issues early season).
- (Soon-to-be-renamed) Squaw Valley is better as springtime venue.
- Mont Tremblant hasn't held a World Cup in decades and has shown no inclination to do so.
The TL;DR: this is a big shot across the bow to Copper and other North American training and racing venues in terms of early season viability. Will the U.S. and Canadian ski associations react in kind?