Look, it's in May 2017 so 2 years after the start of the game and the next Messi is already generated depending on if he or you make him reach his 198 potential.
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Again, I warn you it will take away your fun of the game if you always know the players PA!!!
Personnally, I don't like to buy newgens before 8 or 10 years into a save. I like to buy the REAL best young players (Neymar, Hazard, James Rodrigues, Isco, Verratti, Kante, Varane, Courtois...) and the best wonderkids (Martial, Gabriel Barbosa, Embolo, Berardi, Bernardo Silva, Zivkovic, Ruben Neves, Odegaard, Bentancur, Sane, Pavon, Renato Sanches, Laporte, Stones, Marquinhos, Rugani, Romagnoli, Bellerin, Jorge, Gaya, Donnaruma...). They all turn world class!!!
Once I shaped the team I like, I keep my players until they reach their 30+ of age and stay loyal to them. They become club favorites or legends, and I become one of their favoured personal...
If you have too many and too quickly 180+ Newgens, you'll need to find place for them and get rid of your REAL players just because you KNOW their PA. I guarantee you will lose interest in a save like that because you kind of cheated knowing their PA.
If you want to use genie scout, I advice you to wait 8, 9 or 10 seasons before opening it. Wait that there's much less real players in the database...