Our reader Redmosquite spotted an interesting video interview with Panasonic Sweden. It says:
“Panasonic 100-400mm info from Swedish photo fair, comes in late february, priced at 22-23000 SEK which in Sweden is about the same price as the GX8 + 12-35mm kit. another reference is the Panasonic Lecia Nocticron which cost 15000 SEK in Sweden, so It will be really expensive. “
Considering the Nocticron price is around $1,600 it means the lens will cost around $2,500.