Back in 2015 Bleacher’s Report made a list of players they believed would be top 20 in 2020. These are the comments from reddit back then, including one who predicted who will be top 20 in 2025.
https://www.reddit.com/r/nba/comments/paffrp/in_2015_bleacher_report_predicted_the_top_20/ha4gt1t/
BR’s actual list in 2015 about who’s gonna be top 20 in 2020
Anthony Davis
Andrew Wiggins
DeMarcus Cousins
Kevin Durant
Russell Westbrook
Kyrie Irving
Blake Griffin
Stephen Curry
Paul George
James Harden
Giannis Antetokounmpo
Klay Thompson
Karl-Anthony Towns
Andre Drummond
Bradley Beal
John Wall
DeAndre Jordan
Jahlil Okafor
Dragan Bender
Jaylen Brown
Some dude’s list from 2020 about whom is gonna be top 20 in 2025:
Top 20 in 5 years in no great order:
Luka.
Giannis
Jokic
Tatum
Embiid
Booker
KD
Ingram
KAT
AD
Zion
Ja
Lavine
Trae
SGA
LaMelo
Cade
Brown
Beal
Mobley
Missing: Ayton Edwards Murray Mitchell Bam Collins Fox Halliburton Randle Sabonis Green Bridges Siakim RJ Dame Kryie Kawi Herro Suggs