An den Gerüchten war also was dran:

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Rumours earlier in the week that Square-Enix was planning to reveal a US release of the PS2 remake of Kingdom Hearts: Chain of Memories at this week's Gamestop manager convention have turned out to be true.

It now transpires that today Square-Enix has revealed this as fact, with sources from Gamestop and elsewhere confirming that the Final Mix version of the GBA classic finally heading to US Shores - but as a standalone title without Final Mix. Kingdom Hearts: Chain of Memories for PS2 will hit this holiday season with a price tag of $29.99.
Quelle