Jamieson, Fausset and Brown on Jeremiah 28:4

4. bring again ... Jeconiah--not necessarily implying that Hananiah wished Zedekiah to be superseded by Jeconiah. The main point intended was that the restoration from Babylon should be complete. But, doubtless, the false prophet foretold Jeconiah's return (2Ki 24:12-15), to ingratiate himself with the populace, with whom Jeconiah was a favorite (see on Jr 22:24).