The Canon EOS R5 and EOS R6 will be officially announced on July 9th next week. According to latest rumors on CR, Canon may have a livestream event for announcing the EOS R5 & EOS R6 & new RF lenses, just same as previous Canon Cinema EOS C300 Mark III announcement back in April. There could be a teaser for this event very soon, stay tuned.
Finally, the exact announcement date for Canon EOS R5, EOS R6, and 6 new RF lenses & 2 teleconverters now confirmed, these new products will be officially announced on July 9th, 2020. CR has also leaked the new Canon RF mount lineup image above. The RF 600mm DO & RF 800mm DO IS STM lenses are in silver color.
According to CR, the price for upcoming Canon EOS R5 body in Europe may already leaked online. It could costs €4,500 for body only. Since EURO price also includes VAT, so the US price for Canon EOS R5 body will definitely be below $4,000 USD, which is already rumored before.
Englewood Camera on Youtube had a Camera Shop Talk with Marc Morris of Tamron, the sale rep of Tamron, he confirmed that Tamron will make mirrorless lenses for Canon RF mount soon, currently is under development. You can watch the full talk video above (Canon RF mount confirmed at 29-minute mark).