defintely no way the OCIC2OCI tool will be released so soon.
lot of problems (expected, at least to those with a couple of neurons still working) still to be resolved, some seem to be impossible to solve unless you migrate the data (not so easy) and start a completely new service, similar to a porting rather a migraation (or replatforming as some really genius manager called it. pun intended).
moreover, services available in some OCIC DC are not available in OCI DC, and viceversa.
last tentative roadmap I have seen pictured a mid summer cy19 for the ga of the tool, and it will NOT cover every possible case (i.e. some OCIC customers will be on their own for the migration)