KingDan97 wrote...
Well I mean, they never know who the 2 who survive will be so they'd have to make roles for everyone anyway. I still think they'd develop roles for everyone, with defaults who will be alive no matter what to mesh well with the new squadmates, who could serve as placeholders if the primary choice would be dead. That's the way I see it anyway. I do understand what you mean but I just figure they don't know who the 2 will be, so they'd want to cover all their bases. I respect your opinion and I don't think that one is distinctly a more likely outcome then the other, it depends on how much Bioware is willing to pay or whether they have a pseudo contract of sorts, which I have proposed as a likely case since many games have shared VA's. Even big name ones(Morrigan in DAO was Admiral Xen in ME2 and Vala Mal Doran in SG1, certainly a large name so far as Sci-Fi goes)
That comes down to your definition of role.
For example, I, and many others, see nothing wrong with the survivors being cameos and playing a large role in ME3's ending (like a rally call for war.) They can create all the new squad characters they want, and have the new squad characters for plot integral scenes.
Now, it's possible that we could have a ME2 squadmember act as a placeholder that becomes plot integral (e.g. MacGuffin provider, like Tali or Mordin), but their MacGuffin (or other plot device) should be something
generic or external that anyone can do (like being at the right place at the right time to observe something, get Geth data, save Shepard's ass again, discover a Prothean artefact and be introduced to the plot in returning from said mission, etc.) An internal MacGuffin or quality would be extremely large and highly variable to include, but it's not impossible nor asset heavy to accomplish, but still difficult (meaning I can't quite think of one off the top of my head.) So there are plenty of ways to write a ME2 squadmate character to become plot integral. There just wouldn't be anything to their character, because there's no purpose to them after that.
In another scenario, let's assume everyone from ME2 can be squadmates in ME3. Does that mean they'll all develop more, have arcs, have backstories? No. That's way too much work on completely optional content new ME3 players won't have, nor will that be the focus of the story. Can they be cardboard cutouts of what we knew of them, with not much to say? Sure, but there'd be no point, and that's not why we have side characters, which would only insult ME1/2 players.
The best they can do (there may be more, but this is all I've thought of) is give them basic dialog trees that expand as each plot point continues. Obviously they'll provide more content to LI's trees, and they can have heavy plot involvement (as OP suggests), or fluff.