Batman Beyond had a spin-off called , featuring the android Zeta from the Batman Beyond episode "Zeta." Batman would guest star in the episode "Shadows."
One canon contribution of Batman Beyond to the DC Universe is establishing that Barbara Gordon eventually becomes Commissioner of Gotham Police following in her father's footsteps.
Jurgens keeps the surprises coming right up through the very last page, where another familiar -- if older looking -- face makes a welcome appearance, solidifying this incarnation of Batman's place in DC continuity. Jurgens seamlessly blends elements of the Bat-mythos from both present day and the future, setting up a permanent place for this Batman in the DCU proper that has lasting potential, rather than coming across as a gimmicky crossover between two very distinct eras in Bat-history. "Batman Beyond" #1 is an excellent re-introduction to a once largely benign character that makes a convincing case towards a maintaining a regular role in both the Batman cast as well as the larger DC Universe.