A recent announcement on the 15th issue of Weekly Shounen Young Jump magazine on Thursday revealed that both Tokyo Ghoul and Tokyo Ghoul:re have printed a total of 22 million copies in print. With that said, this is considered as a big milestone for the franchise.
Viz Media has officially licensed the sequel manga and there are plans of releases this fall. The 12th volume of the Tokyo Ghoul manga is slated to release the West on April 18.
Additional info can be found in Anime News Network.
More information can be found at Anime News Network.