Before you get too carried away with suing them... better brush up a bit on Canadian law vs. American law.
Electronic Arts is an American corporation, which happens to own BioWare. This means, the jurisdiction of this case would be in the United States and not Canada. Canadian law is in no way germane or relevant to this discussion.
I wouldn't not on those grounds (and because I'm not a greedy enough bastard) because every piece of media I own has had made promises and doesn't represent what I was I thought it was letdown and just getting what I was told or just being let down by a piece of entertainment is not the same as being poised by bad food, get hurt or killed by faulty car parts.
Oh you could probably sue them sure on those grounds, but chances are that, in the USA at least, you would lose because it's a waste of everyone time and major multi-national companies run everything including the courts.
Contrary to popular belief, we wouldn't sue because "video game was not what I expected." This is an issue of falsely marketing a product and selling it to consumers to their detriment. Depending on the severity of this breach, it could amount to fraud and be a serious issue for EA if they were to fail to provide what was promised. You don't just state our product offers "A, B, and C" when in actuality it offers "D, E, and F." You will have standing and a right to sue for damages because you were lied to and you will win in the court of law. If corporations could say whatever they want and lie about their products all the time, you better believe they would to make them sound as amazing as they could.
You'd get laughed out of court but okay sure I guess
Oh I'm sure even though I've extensively studied contract law, corporations, agency law, etc. and have written opinions for a US District Court Judge. What have you done? Oh, you probably aren't even a legal professional or a lawyer... Which means you have no idea how US courts function and what cases would actually be frivolous or not.
Sue for what? The money you didn't spend? 
Also, you're acting like EA/BW put together a kickstarter for MEA. An investor is investing in the company as a whole, not just one project. As long as they get a profit it doesn't matter if MEA comes out or not.
Actually, it does. If MEA fails to release, that would result in a significant fall in profits for EA that would affect their share value. Considering MEA is one of their most prized franchises and highly anticipated games, the game not releasing is not an option. As I already stated, millions have already been invested into the product and it will release because it is the purpose of a corporation to recoup the loses it has invested.