My favorite guy who I expect to make a similar jump next season is Kerem Kuthan Konan. He is ready to take of and brings everything what I expect from a power forward.
He already made 3-4 very convincing BSL games being October 2004 born. He fights for every ball, can rebound, defend, create from post, dunk and shoot. He cant create shots for now but is exactly what we need. Next season will be his breakout season with Besiktas.
The second guy who is the near the NT level is Sadik Emir Kabaca of Galatasaray. Almost 2001 born between 6'10 and 6'11 Idk with a huge wingspan and a clear shot and solid contact defense responds to most of the needs of the NT
https://www.youtube.com/watch?v=zWXno4rly08
He has some coordination problems but could make his jump next season.
The next guy should be 2002 born stretch four of University of Miami Tibet Görener who will need 2-3 years.
https://www.youtube.com/watch?v=cW0q5GbfO3g
To give an impression
Next is my favorite guy who plays in the second team in Murcia (2004) 6'7 to 6'8 Yigit Hamza Mestoglu. A hell of a fighter. Has a polished body and a similar good post game to Alperen Sengün when he was at his age. He has started to shoot and has already taken minutes with the A team. I love him.
https://www.youtube.com/watch?v=OoEmpXjK20I&t=38s
The next both are Berke Büyüktuncel also 2004 born probably 6'10 with great defensive tools and shot but this kid has mental issues and needs couple of years but is a legit talent
https://www.youtube.com/watch?v=vqWrGUC8LV4&t=106s
Lacks explosiveness and vertical pop but is a great defender and can create his shot.
Last but not least is Demir Dogan.
I recognize problems and try to measure talent objectively. All those mentioned guys except Berke Büyüktuncel are clear (at least) Euroleague material.