It says least likely: The largest/anchor tenant will always have a long lease…to quote from CFAI text.:
"For example, in the United States, the length of leases for the smaller tenants in a shopping center are typically three to five years and are longer for larger “anchor” tenants, such as a department store"
A large anchor tenant with a high credit quality is always preferred for a ‘long term’ (10 plus yrs) stable cash flow. While many retail leases do have %rent linked to sales, its is not necessary to have such an arrangement.