The Blazers would not want Rondo, especially *without* Aldridge. Are you forgetting they have last season's Rookie of the Year on their roster playing the same position? If they're getting rid of Aldridge, it's to fully commit to a rebuild, so it makes no sense to bring in a guy like Rondo - and they're not going to shift Lillard to SG full-time. Bradley and Sullinger/Olynyk? Sure. But not Rondo. Lillard makes way more sense and has far more potential for them. Not to mention, Lillard makes a fraction of what Rondo is paid, as he still has three years left on his rookie contract.
That's probably true, it was more of an attempt to point out that it's not realistic to expect to add a player of Aldridge's age and ability without parting with Rondo.
I don't think it'll happen (especially now that Aldridge has come out in USA Today to announce how happy he is in Portland), but I also certainly don't think it's impossible; the Knicks didn't have to ship out their best player at the time in Amare when they traded for Melo, after all. They *did* have to gut their team, and I'd expect no less for an Aldridge trade: Bradley, Sullinger or Olynyk (more likely both, just as the Knicks had to give up both Wilson Chandler and Danilo Gallinari), and at least two first-rounders, among other things. I'd also expect the Blazers to demand that the Celtics take back a bad or unwanted contract. The Celtics could theoretically keep Rondo and Green, but there wouldn't be much depth behind those guys and Aldridge.
Not even going to touch the idea of trying to include Wallace since Portland would laugh right in Boston's face and hang up the phone.