Quack, quack, quack. Kenan Thompson flashed a “Mighty Ducks 4” script — after Disney rejected his co-star Emilio Estevez’s pitch for a fourth installment of the franchise — at the Anaheim Ducks game on Sunday. In a clip shared by Sportsnet, Thompson, 47, wore a “Tyler” jersey in honor of his character, Russ Tyler, whom he played in 1994’s “D2: The Mighty Ducks”   and 1996’s “D3: The Mighty Ducks,” as he held up the script from his seat in the stands. The “SNL” star also led the stadium in a