The doc docs.oracle.com/database/122 is available. Check new features and stay tuned.
Okay, just 12 for today : HIGH compressed index, case insensitive database with bound collation, partitioned external tables, AL32UTF8 default for new database, listagg overflow, VALIDATE_CONVERSION, approx_percentile, json_exists, flashback pluggable database, the SHARING clause, RAC streched clusters site definition and INACTIVE_ACCOUNT_TIME in profile.
Some I like more than others 🙂
Okay, one more : SQLPLUS HISTORY !