When will the new PowerCore 20000 be coming out for sale
If you are referring to the new PowerCore 20000 with PowerIQ 2.0, it is already available!
There is a PowerCore+ 20000 with USB-C PD coming soon, but that won't be available until Q4 of the year.
is there a picture or something I can see?
I might be interested in the PowerCore+ 20000 with USB-C PD
Not yet that I know of. Apparently, they will be "lighter" support passthrough, and the 20k will have 45W PD capabilities.