Do the event emotes reappear in future reward stores?

I usually prioritise buying the emotes from the event stores, unless there's a new card available. (Kid Omega was too expensive so I passed on him).

However, the zombie fist bump emote seems kinda pointless, so I'm thinking I'll pass on that in favour of the champion variants.

I'm just curious though, I've seen that previous stores have sometimes included generic cosmetics that cycle through including previously released emotes. (Beast, Ms. Minutes etc.) Does anyone know if previously store reward emotes show up in those too? (E.g. The Collector, Jeff, etc.)? Just incase I change my mind and want to get it later.