Worth noting that DE includes the 1 expansion from the original AoE 2, and the 3 expansions from the 2013 HD release as part of the default, standard edition. So, if you're like me, and only ever played the base version of the original AoE 2, there will still be new AoE 2 content for you to try without needing to buy the deluxe edition of DE. The 4 expansions which are included with DE standard edition and Gamepass are:
The Conquerors
-4 new singleplayer campaigns focused on Atilla the Hun, Montezuma, El Cid, and a 4th made of random unrelated battles from across history.
-5 new civilizations: Aztecs, Mayans, Huns, Koreans, and Spanish.
The Forgotten
-6 new campaigns focused on Alaric I, Bari, Dracula, Pachacuti, Francesco I Sofrza, and Prithviraj
-5 new civilizations: Incans, Indians, Italians, Magyars, and Slavs
The African Kingdoms
-4 new campaigns focused on Francisco de Almeida, Sundjata, Tariq ibn Ziyad, and Yodit
-4 new civilizations: Berbers, Ethiopians, Malians, and Portuguese
Rise of the Rajas
-4 new campaigns focused on Bayinnuang, Gajah Mada, Le Loi, and Suryavarman I
-4 new civilizations: Burmese, Khmer, Malay, and Vietnamese