Late to the party, but just for fun some gold predictions.
Safe bets:
Basketball men, Basque Pelota x2 (both Trinquete), Boxing (L. Sánchez), Canoeing (Vernice), Field Hockey (2), Judo (Pareto), Rowing (M2-), Rugby men, Sailing x2 (Lightning, Snipe), Skating (Artistic x2), Softball (men), Surf (longboard men), Swimming x3 (Pignatiello 400, 800, 1500).
Contenders: Basque Pelota (Fronton Cuero), Beach Volleyball (Women), Boxing (D. Sánchez), Canoeing (K2 1000, K4 500), Cycling (Molina in BMX, Soto in MTB), Handball (men), Karate (Y. Benítez), Rowing (M2x, M4x, M4-, LW1x, LM2x), Sailing (RS:X men, both 49er, both Laser, Nacra 17), Shooting (F. Gil), Taekwondo (L. Guzmán), Waterski (E. De Armas).
I´ll go optmimistic and say 25.