Iranian oil potentially returning legitimately to the market will not be a shock and a complete return will not take place at least until the summer of next year, Goldman Sachs says, as the U.S. is taking part in indirect talks about the so-called Iran nuclear deal. “With OPEC+ appearing to manage its exit for now, supply concerns will likely shift to the potential return of Iran to the JCPOA (Joint Comprehensive Plan of Action) agreement,” analysts at Goldman Sachs said in a note on Monday, as carried by Reuters. The United States…