User blog comment:B214/Akame ga Kill! Episode 21 review/@comment-5105419-20141125092634/@comment-1359322-20141125101207

Without Wild Hunt in play in the anime, both NR and Jaegers have 4 members left.

Night Raid:
 * 1) Tatsumi
 * 2) Akame
 * 3) Leone
 * 4) Najenda

Jaegers:
 * 1) Esdeath
 * 2) Wave
 * 3) Kurome
 * Ran

I don't think this is just coincidence from the anime producers. The final four will fight, who will life, who will die, or will both lose their lives. Simple concept.