In September 2016 the first Gaia Data Release of the European space astrometry mission Gaia was published. At that time, Gaia-external data like the Hipparcos and TYCHO-2 catalogues had been used in order to allow for the early production of some parallaxes and proper motions. For April 2018, the second Gaia Data Release (Gaia DR2) has been announced. This release will be based on Gaia data only and will provide full Gaia astrometry and three-band photometry for the majority of all stars to be released. We present an outlook in this outstanding second Gaia Data Release and discuss its probable contents and expected uncertainties. The number of motions and parallaxes will rise from two million to the order of one billion, and the precisions and accuracies will significantly exceed those of Gaia DR1.