Here are the materials in Sault Ste. Marie of Chippewa Indians v. Cross (E.D. Mich.):
And here are the materials in the underlying suit that gave rise to this complaint, Cross v. Kewadin Casinos Gaming Authority (E.D. Mich.):
Here is the petition in Alabama-Coushatta Tribe of Texas v. Texas:
Whether IGRA authorizes gaming on tribal lands previously governed by trust statutes that prohibited gaming, as the National Indian Gaming Commission, the Department of the Interior, and the First Circuit have concluded, or not, as the Fifth Circuit has held.
Lower court materials here.
Here is the opinion in Town of Ledyard v. WMS Gaming, Inc.: PDF
Here are the additional materials in Commonwealth of Massachusetts v. Wampanoag Tribe of Gay Head (Aquinnah) (D. Mass.):
Prior post here.
Here is the complaint in MGM Resorts Global Development LLC v. Dept. of Interior (D.D.C.):