The phrase "wide span" refers to a large or broad range or distance. It is used to describe something that covers a wide area or includes a wide variety of things. Full definition
• Relationship - hierarchy & span of control, narrow v wide span of control. (tes.com)
\ n • Relationship - hierarchy & span of \ n control, narrow v wide span of control. (tes.com)
Normally, a studio takes this as a sign to make another film in a potentially wide spanning franchise, but in this case, it'd probably be best not to. (cinemablend.com)