Assuming the Celtics continue to play as well with Rondo as they do without him, and considering the interest in JJ Reddick, I wouldn't be surprised to see them be traded for each other.
Despite my screen name, I actually came around to Rondo because of what he was able to do in the playoffs last year. But if it turns out we don't need him, JJ Reddick might be able to fill the role of Ray Allen better than Jason Terry has.
Long term, a starting lineup of Bradley, Reddick, Green, and Sullinger would be a very balanced well shooting team. If we have 4 good shooters, we could afford to have a goon center in Fab Melo (or whoever is available in free agency) whose sole role is to play defense and rebound, in the way which Kendrick Perkins used to.
If we were to trade Rondo for Reddick, what else would need to be involved and would you even consider it?