As long as there are two surviving crewmembers besides yourself, you can not die at the end of ME2. Any gamesave that has a dead Shepard at the end of ME2 can't be used for ME3, so you have to have two left.
There are a couple crewmembers that survive no matter what unless you specifically try to kill them off in the endgame, with Zaeed and Kasumi not being the ones in question.
I'd like to see Kasumi and Samara carried into ME3 for numerous reasons, mainly because I think they both have good points to move forward into further development, now that their "big thing they've been striving towards" has been fulfilled. Kasumi has Keji's graybox (or doesn't, depending on what you do) and experienced the memories within, so she has her closure with him. Samara has killed Morinth (or been killed by her, again, depending on what you do), so she's fulfilled her life's mission and has her closure. Both of those characters may have some finding of a path to follow after those items have been fulfilled.
Zaeed's gotten his revenge, and from what he's talked about in his loyalty mission, he's tiring of the gun for hire route, so he may be looking for something to end his life with/go out on a high note. He's talked about finding somewhere to pack it up and retire, so in that way, I could see him coming back / not coming back and be fine with either event.
I think Bioware easily made sure in their planning for ME3 that all the ME2 love interests moving forward into ME3, so I know we've covered six of the squadmates. Out of the rest, I can't see them kicking Mordin and Grunt to the curb so quickly, with the effort they put in with their character development in ME2. The rest, I'd like to see Samara and Kasumi come back for obvious reasons, though Zaeed and Jacob, I'd be fine with them coming back or not coming back.
Originally Posted by Ryuukishi
That's a really good point. Maybe BioWare would throw in alternates (like, if Wrex and
Grunt are both dead, you get Wreav, but in no other circumstance).
Or maybe they're just going to give us Liara, Ash/Kaidan, everyone from ME2 who was recruited and alive including Zaeed and Kasumi, and 4-5 newcomers too. Standing room only on the Normandy.
You're going to have to work out the Mordin / krogan situation (via Wrex, Grunt or Wreav), though there's much too much left in limbo without resolution to let that go by the wayside.
I'm sure we may see some changes in quarters on the Normandy if we're suddenly up to having more than the ME2 crew onboard.