User blog comment:Teugene/Mass Effect 3 at the E3/@comment-1388547-20110531225102

If they follow what they did for ME2, they'll probably do something mid-game, not spoiling any significant plot twists. In order to avoid dependence on the outcomes of the previous games, and maybe annoying people who played them differently, I expect they'll only include squadmates who are guaranteed to be in ME3 -- Vega/Liara seems like a good possibility, but they might also show off another squadmate or two who are new in ME3. I would expect they'll be focusing on moment-to-moment gameplay -- combat tweaks, new enemies and abilities, plus any additions to the conversation mechanics -- and won't have much to say about the overarching plot of the game. I'd really like to see the new and improved enemy teamwork, and also the things they've done to add depth to the evolution of characters' powers. (I'm really curious about what they'll do there. They've mentioned that we'll be able to evolve powers multiple times, and I'm wondering if they're doing something like the nonlinear skill trees of Dragon Age 2, but with upgrades to individual powers instead of families of skills.)