It would be an immediate buy for me if anything Canon releases directly competes with the RX100 iv.
4k, 960fps slowmo and everything included. Of course, they can up the game and make it a constant 1.8 aperture.
I would gladly fork over $1500 to $2000 for it... Though the cheaper the better. Also, can't be more than 1 year for it to be released.