Got to say I like this, I'd rather have say 6 potential squadmates with longer, better thought out interactions than the 14 I have in ME2 with the DLC.
Definitely want to keep from ME2: Tali, Jack, Garrus, Mordin.
Definitely bring back in from ME1: Liara, WREX!
If they have 7 or 8 slots they can fill them out with either Legion (if we're going to see the Quarian/Geth storyline brought to a conclusion), Samara (interesting character that needs more depth to her story and personality) or Ashley (sorry Kaiden, for some reason you always end up as fallout on Virmire).
Definitely get rid of: Jacob (a bit useless and apparently has a huge stick up his arse), Miranda (arrogant *****), Thane (interesting, but may be too ill to continue and is a bit too similar to Garrus), Grunt (superseded by bringing Wrex back).
Ofc they could always be really creative and give us an Elcor squadmate with a back-mounted turret or throw in some of the other ME2 NPCs as squadmates.
Then bring Wrex back and sort out the backstory with Aria/Aleena; find out if Matriarch Aethyta is Liara's 'father'; sort out the Quarian/Geth War; see off the Reapers and live happily ever after with . Simples!