The Force/Psionics/Biotics/Whatever- needs to be in the game if they want the franchise to reach Star Wars levels period. RPG elements- social players love seeing their character get stronger. Third person perspective - again, social players love seeing their character get progressively more cool looking. Also the camera angle is just better. Lots and lots of guns - keeps the game fresh when you can play with a variety of different weapons. Multitude of distinct enemy factions- again, keeps the game fresh for longer. The gameplay of Mass Effect 3 MP (the golden triangle perfected, guns, melee, and powers all mix together to create a sublime experience) combined with an open world full of quests that you can explore alone or with friends from the Borderlands franchise combined with a persistent shared hub similar to Guild Wars that would allow you to interact with the global community to form parties or trade = could be amazing. I'm not really sure what they should do with PVP, but if they want to have a PVE campaign that really and truly is legendary (and isn't just an overpriced movie), that's what they should aim for.

Giant statue of a potato please.

#FOLLOWURDESTINAY!!!

That sphere hovering above the Earth is an artificial intelligence that wants humanity to attain their former glory, and reach the next step in their evolution. The AI was built by a race hostile to humans and was built to destroy them, but it developed passionate feelings toward them, and turned on its masters. The Sphere now acts as a guardian for the last city on Earth, and its creators have returned...

An evil antagonist that builds up to an epic climax where the final battle is a series of 3 QTE's.