Shipping is said to start in September 2017. A shipment two months after the announcement is unusual for an entry level Canon DLSR.
There is a lot of confusion going on with the next Canon announcements. Since when Canon started to be very secretive about their upcoming products rumors go wild.
Usually we get some intel about upcoming products (here and on other sites). Nothing leaked so far, neither about the EOS 6D Mark II nor for the Rebel SL2.
Take this with a grain of salt. Rumor sites are in distress since Canon started to keep their stuff private.
We keep you posted, stay tuned.