Expect a packed courtroom Monday morning when the 3rd U.S. Circuit Court of Appeals takes up an emergency injunction request brought by all of the major professional sports leagues — baseball, football, basketball and hockey — to challenge Delaware’s soon-to-be-launched sports lottery.

At issue in the appeal is whether Delaware’s proposed lottery — currently set to start in three casinos Sept. 10, when football season opens — violates the federal Professional and Amateur Sports Protection Act, or PASPA, passed in 1992.