Wouldn't a much bigger deal be distributed part of the Oracle database in the cloud, not ML? Because turning a feature rich RDBMS into a decent distributed database is not really possible. You either have to sacrifice consistency, which by the looks of it is what Oracle is thinking to do [1], or you have to sacrifice both performance and availability. And there are already cheap not CAP consistent RDBMSs as services in the cloud. It's just hard to imagine how Oracle can leverage 90s era technology in a distributed world.

[1] http://oracle-help.com/articles/oracle-18c-future-database/