Arsenal have had many incredible young players represent them over the years. Who is the one Arsenal academy player you thought would become a superstar but never did? MORE ARSENAL STORIESThat is why Transfermarkt named the defender in their Most Valuable U21 XI of 2016 that also featured stars like Joshua Kimmich, Raheem Sterling and Gianluigi Donnarumma. In 2022, Mikel Arteta’s Arsenal terminated Bellerin’s contract after a year away on loan, and he ended up joining Barcelona. It’s a real shame that Bellerin did not fulfil his potential at Arsenal.