Ainge won't do it, unless Rondo asks for a trade. And I doubt Rondo will want to join the Pacers. Would be a great fit though.
Why wouldn't he want to? It seems like a lot better of a situation than Boston at the moment. He would be a hell of a fit, maybe turn Indiana into a legitimate championship contender. Boston isn't contending next season, so I don't know why Rondo would want to stick around during this point of his career.
Why wouldn't Rondo want to do this trade? That's easily his best and most realistic chance at winning the championship next season. Unless something crazy happened with the Lakers and they re-sign Howard and trade for Rondo. But I doubt that happens. Miami cant afford him and a ton of the other elite teams already have great point guards so it wouldn't make any sense.
Indiana is right there... with Rondo? Contenders for sure.