Thought I would insert that photo from
Kathy Werling's report here for a reference for the thread.
And again, yes, the Nemo pool is for AoA guests only according to the goggle rules, and the reports that the pool area fence requires your room key. Perhaps this sign can be changed (it also lists pool hours) but here's what they will start with.
Additional thought...so each resort's pool rules are always going to say it's for the exclusive use of that resort's guests. But with this sign and the key access, it's looking like your Pop KTTW card is not going to let you in.