The announcement of a Final Fantasy XV demo arriving in 2015 has spread like wild fire! Game Informer broke the news this morning in an article that has since been deleted, leaving many to speculate why it was taken down so quickly. It's worth pointing out that Game Informer is a long running reputable website, so even if you want to take this news with a grain of salt for the moment, it may just be worth getting your hopes up.
According to Game Informer, Square Enix is calling the demo "Episode Duscae". It will take place in an early part of the game's story that lets players "see some opening sections of the game in action" with slight modifications to make it more suitable for a demo experience.
A voucher for the demo will be available with the release of Final Fantasy Type-0 HD, rumored to be released on March 17th. It's still unclear at this time how soon the demo will be available after you receive the voucher.
Here's a screencap of the now deleted Game Informer article, as seen on Kotaku (click to enlarge):
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