Next week on February 12 Olympus will announce the new E-M1III and this new 12-45mm f/4.0 lens.
According to our sources this lens delivers a very high quality. Similar (if not a touch better) than the 12-100mm f/4.0 PRO lens.
What worries me a bit is that it appears we might not get any new about the 150-400mm PRO lens. This lens is scheduled to start shipping in Summer only :(