They're on the verge of losing their loot box economy in Europe and being threatened with fines. You and me got to pay those fines and make up that income so the execs and investors don't lose anything. so it won't even be close to free, I fully expect £60+ at launch.
I don't see that happening on PC or console. PlayStation users will get access to Mass Effect 1 for the first time, and that alone is a big selling point. PS3 owners can't own all the existing games.
It's also worth noting that Hot Pursuit Remastered and Burnout Paradise Remastered were not free to existing owners.