References story from Batman Comics issue 113, BATMAN--THE SUPERMAN OF PLANET X.
Rohtul is Luthor backwards, in the same sense the Batman of the foreign planet mirrors Superman's secret identity. Also the fact earth Batman is weakened by quartz as is Superman is by kryptonite.
Zur-En-Arrh's Batman is voiced by Kevin Conroy, who has played Batman in various media and is considered the definitive Batman voice, and Dana Delany (Vilsi Vaylar) played Bruce's love interest, Andrea, in Batman: Mask of the Phantasm (1993) and Lois Lane in Superman: The Animated Series.
Zur-En-Arrh's versions of Lois Lane and Lex Luthor, Vilsi Vaylar and Rohtul, are voiced by Dana Delany and Clancy Brown. They previously provided the voices for Lois Lane and Lex Luthor in Superman: The Animated Series (1996-2000).
The alliterative name of Zur-En-Arrh reporter Vilsi Vaylar mirrors that of Veronica Vreeland, Bruce's socialite friend from Batman: The Animated Series (1992).