User blog comment:Commdor/Omega DLC Plot Elements Leaked/@comment-5558345-20121006205209

I think Zaeed making a return as squad member is good choice, why? in ME3 if Shep isn't a Solider, then you have to relay on Ash or Garrus or James to be your Assault buddy but Ash and Garrus can die, and No Squad member first introduced in ME2 is a Squad member in ME3. Also after you do Zaeed mission on the Citadel, talking to him he tells you that he'll see what he can do about supporting Shepard.

Also this DLC may take place before Zaeeds mission on the citadel, if you kill him on Omega then you have only have the turian colony as a option or something like that.