User blog comment:Chinkycandie/Crisis on Earth X/@comment-1330227-20171020175840/@comment-3127448-20171020232717

What I mean was Kuasa has a different voice actor to her actual actor. The same can be for the crossover. Grant will voice Flash-X but won't necessarily play him.

It also gives TC a chance to be part of the crossover since his other appearances in previous crossovers were minimal (and show off his acting chops).