Nerevar-as wrote...
TIM is protecting Miri´s sister from their father, so he´ll probably have Miranda back if the devs want it. He´ll probably be more angry with you if the base was destroyed, but he didn´t seem that stupid to go hostile against Shepard before Reapers are dealt with.
Tali is unclear, her status in the fleet can be too different after ME2.
Anyway, Liara and the Virmire survivor are the only squadies sure to be alive so far, so I don´t expect much from the ME2 ones. While you can´t survive with a total squad kill, they only have to make the default survivors the ones with less possible influence, i.e. Thane (death in months) and Jacob.
Well Cerberus did a lot of stupid and pointless things already so TIM going against Shepard is not outright impossible though somewhat unlikely,still I somewhat hope to see Cerberus to go down in flames
As for Miranda if they really go the route and have her rejoin Cerberus in case of a paragon ending anyway well that says something about the writers and its nothing good,although Miranda quiting was totally weak and came out of nowhere anyway
As for Tali,as I see it they could make her an admiral regardless of what Shepard did in her quest,even if you get her exiled she pretty much says if they find something worthwile on the Collector base they will let her back in again,I choose to take that as somewhat of a hint,though it really made me scratch my head,whats the big deal with Exile if you can go back so "easily" anyway
Also I agree that we shouldnt really expect anything from the ME2 squad in general,I fear it will be meaningless cameos all the way or in Thanes case hes just dead anyway
As for Liara Ash/Kaidan I wouldnt get my hopes too high for them either right now