ViacomCBS is the name of a merged corporation between CBS and Viacom. It will create a joint media library including over 140,000 TV episodes and 3,600 movies.
In their announcement, the companies note that the merger creates a joint content library that includes more than 140,000 TV episodes and 3,600 films, and “reunites fan-favorite franchises such as Star Trek and Mission: Impossible” (which were previously split between Paramount on the film side and CBS on the TV side). They also say that this will allow them to “accelerate” their direct-to-consumer strategy, which includes offerings like CBS All Access, Showtime and Pluto TV. The deal is expected to close by the end of 2019.