With the European leg of its 2020 stadium tour wrapping in August, it seems likely that any Rammstein 2020 tour dates for the USA will take place in the fall. Based on the video on Rammstein's website, the tour would launch in Quebec and end in California, hitting the Midwest, Texas, and the East Coast in between.
It also means that the band is unlikely to perform at Lollapalooza, but could perform at another festival like Riot Fest. All Rammstein 2002 US tour rumors are currently unconfirmed, however.