It is not ready to go, as the upgrade kit isn't ready.
I did figure out the confusion though.
On the matrix provided here: http://www.coolermaster.com/amd-am4-ryzen-compatability/en/#am4-compatiblity-list
I was looking for MasterLiquid Pro 240, except it isn't listed. MasterLiquid 240 is and that is where my eyes went and it seems to be supported. However, there is a generic MasterLiquid Pro Series that indicates "upgrade kit available soon". Why they broke out MasterLiquid 240 and MasterLiquid 120, but not MasterLiquid Pro 240 vs other MasterLiquid Pro XXX is where the source of confusion is coming from. They should have listed out all of the individual MasterLiquid Pro series to avoid this unnecessary confusion and frustration. I would not have purchased the Pro version if the matrix was more explicit.