I would like to see legacy wide stuff but I won't hold my breath. They may start the shop out as single character content then change it legacy wide if sales are low. Or vice versa if sales are high.
I hate to bash EA all the time but we all know what they are like. In EA's eyes if I buy a legacy wide bit of content it's one sale. If I buy content for my main then alt it's two sales. EA and investors are happier with the latter.
Who's to say freebie players will get to have a legacy at all? Won't character slots be limited to 1, maybe 2?