The previous rumor said that Canon is actively working on new EF 70-200mm f/4L IS II USM lens, which will feature new processes and technologies. According to the Japanese website Nokishita, Canon is currently testing the EF 70-200mm f/4L IS II USM Lens and EF-M 32mm f/1.4 STM Lens. The official announcement is rumored to be announced before Photokina 2018 event. The details is unknown at the present.
Stay tuned for more info.