I'd love a drop-in co-op where people took charge of your team-mates. You know who there worst enemy throughout the first two games was? Me because they ran from cover-to-cover directly into MY line of fire. I'd have killed to have my team not die because they couldn't decide which wall to hide behind.
Co-operative multiplayer with its own campaign would be good too. Taking the place of a group of redshirts for 'what happened before/after Shepard shows/showed up' or even something set in the same universe would appeal somewhat. Plenty of stuff that happens in the galaxy doesn't involve Shepard.
Competitive also has it own opportunities although it's the least appealing to me. There's a boatload of conflicts to pick from.
It'll be interesting to see what comes of all of this.
Co-operative multiplayer with its own campaign would be good too. Taking the place of a group of redshirts for 'what happened before/after Shepard shows/showed up' or even something set in the same universe would appeal somewhat. Plenty of stuff that happens in the galaxy doesn't involve Shepard.
Competitive also has it own opportunities although it's the least appealing to me. There's a boatload of conflicts to pick from.
It'll be interesting to see what comes of all of this.