It is possible that this scene does not show a training sequence, but a fight between Flash, Kid Flash, Vibe, and a new metahuman villain.
The most likely possibility is that this new meta is Max Mercury – another speedster from the DC vault.
Max Mercury is far from the only white-haired character in the DC universe, and without the distinctive costume, it’s impossible to know exactly who this is.
We’re just over halfway through the third season of The Flash, and this week, everyone is excited to see the return of Gorilla Grodd in the upcoming ‘Attack on Gorilla City’.