A poison dagger takes out Rehgar's tweeted epithet as "Azeroth's fiercest gladiator", and the Hearthstoniest blood elf is the leading suspect. Rehgar and Valeera have history - like weird combination of gladiator slave / master and mentee / mentor history - so many think she might be next up for Heroes of the Storm:
Diablo fans are crying foul for the lack of devilish love this close to Diablo's 20th anniversary, but Valeera has been waiting in the wings a while too. It was 8 years ago last October when Valeera made her first appearance in issue #0 of the original World of Warcraft comic.
UPDATE: Valeera confirmed in a subsequent tweet:
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