The Batman 2004 Flash !link!

Makes a cameo appearance alongside other Justice League members as they invite Batman to join their ranks.

If you're thinking of a specific film or project, could you be referring to: the batman 2004 flash

: The two-part series finale features the entire Justice League, including Flash, teaming up to defend Earth against an alien invasion by "The Joining". Metabolism & Humor Makes a cameo appearance alongside other Justice League

: He is one of several powered League members (including Superman and Green Lantern) kidnapped by the alien invaders known as The Joining The Power Theft : The Joining uses Hugo Strange the batman 2004 flash