I don't know how it happens, but once again somebody has made a mistake on Amazon and has accidentally posted up a product listing that really shouldn't be there. Recently, a product listing for Mass Effect for the PlayStation 4 was found on Amazon, however after it was shared across the web, it was shortly removed from the website, confirming that it shouldn't have really been there in the first place.
Whether or not it was an accident, or a smartly placed marketing attempt by BioWare, it's clear that something Mass Effect related might just be coming to the PlayStation 4 soon. The description for the Mass Effect product listing on Amazon wasn't filled with much details, so we have been left to speculate.
It's very unlikely the listing was relating to the new Mass Effect game as there is still a lot of work that needs to be done before the game is ready for promotion. Instead, I personally think the listing could be suggesting a new PS4 port for the original Mass Effect game.
If i'm correct, then perhaps we could expect a full port of the entire original trilogy to next gen consoles. If we get an HD remake on top of that too, I'd be most impressed, but that may be pushing it a little bit.
Oddly, the game only mentioned a PlayStation 4 release for the product listing, but this could simply be because the listing was not fully completed before it was put online. The release date for the listing was December 31st 2014, which sounds like a rough placeholder date. Hopefully we'll hear something from BioWare about this.