Everyone here posting pessimistic comments would be more useful keeping them to themselves. Everyone knows it's an uphill battle. It always is going against big corporations.
But a few things to think about.
1. No contract, terms of service, or license agreement is EVER above the law. A court can throw any of it out if a judge deems it unfair.
2. The EA model has never been tested for this scenario. That being a scenario where a company has promised multiple times the game will not get cancelled. Has laid out a roadmap. Has advertised this roadmap in it's marketing materials. And has the funding to complete all of it and simply walks away from it. That to my knowledge has never happened. EA titles get cancelled all the time but almost never when they are backed by a AAA publishing company.
What we have is a golden opportunity here to strengthen consumer rights in the EA model. So unless you're a billionaire who makes money screwing over gamers, a lawsuit benefits us all.
Don't naysay someone trying to fight for consumer rights. Wish them luck and sign up to help if you can.