CREATE TABLE table_203_720 (id DECIMAL, "date" TEXT, "opponent#" TEXT, "rank#" TEXT, "site" TEXT, "result" TEXT)

which is the only opponent to play in the louisiana superdome ?
SELECT "opponent#" FROM table_203_720 WHERE "site" = 'louisiana superdome • new orleans'
SELECT "opponent#" FROM "table_203_720" WHERE "site" = 'louisiana superdome • new orleans'