Rek'Sai = Kaiser
I was just looking at her name a bit more closely after listening to her various zerg references. And I realized that her name is a scrambled version of Kaiser. This could have something to do with Mordekaiser, but I was thinking it was actually another hidden reference to the zergs. The zerg heavy ground unit "Ultralisk" has two/four very large scythes on their arms and they're called KAISER BLADES Tell me I'm right!?
EDIT: This makes me wonder if all of the void champs are scrambled words of other references. o.O