Does "any" mean "all" or "one" for cards like Cheetah?
According to this BGG thread (which cites a play-tester), it means you can take any one card. At the end of the thread, game designer Matt Hyra (one of the co-designers for the game) corroborated this and added the following:

Just as an FYI for future card reading: If a card gains &quot;all&quot; of something, it would be written like:
Gain all cards with cost 4 or less from the Line-Up.

This is pretty common in card game terminology (citation needed I suppose?) where being able to take all cards would say &quot;all&quot; or similar.