Square Enix has revealed that both North America and Europe will be getting the Dissidia Duodecim: Prologus demo, which is a precursor to Dissidia 012: Final Fantasy.
It was released some time ago in Japan as a paid-for demo, and when it appears on the PlayStation Network next week, it will cost $2.99. No European price has been detailed yet.
You'll get the chance to play as one of the new characters, Lightning, and purchasing the demo will unlock Aerith as a support character in the full game.
Colin had the chance to check out the Japanese version of the demo and was suitably impressed. If you're unsure about it, I'd read his impressions to get a bigger picture.