I have already reported that various manufacturers are expected to announce several new lenses in September. Sigma is rumored to introduce a new 28-105mm f/2.8 ART full-frame lens for Sony E and Leica L mount. The lens is rumored to be less than 1kg and an 82mm filter size:
It seems that bigger f/2.8 zooms are the latest trend in the industry since Tamron is also rumored to be announcing a new 28-180mm f/2.8 Di III VC VXD lens:
Tamron is rumored to announce a new 28-180mm f/2.8 Di III VC VXD lens
Canon already has the RF 24-105mm F2.8 L IS USM lens: