Entrants relying on paying drivers believe that a regular eight-race schedule will not be economically feasible as recession bites amid the COVID-19 crisis.
LMP2 points-leading team United Autosports has suggested that a five- or six-race calendar would be more viable for 2021.
"If we end up with eight races again, the WEC will have underestimated what is going on in the world," team co-owner Richard Dean told Motorsport.com.
"We have to have fewer than eight races: whether that's just five or six or a schedule that just focuses on the bigger races, I don't know.
"That means everything travelling by sea freight to bring down the travel costs, as well as fewer races.
"As much as the rest of 2020 is scary, the 2021 season is even more scary because the wealthy guys who pay for the racing are going to be conservative with their money."
"Reducing the number of races is the obvious thing to do; I think five or six including the Le Mans 24 Hours would make it more viable."
The WEC has refused to talk in detail about its plans for 2021 after it ripped up the winter calendar format when Le Mans was pushed back to September as a result of the COVID-19 crisis.
He also stated that it is the WEC's intent to begin the season at Sebring in March on the same bill as the IMSA WeatherTech SportsCar Championship.