According to the deal, ProSiebenSat.1 has the license to officially publish eight of SOE's titles in 40 countries. These MMOs include DC Universe Online, EverQuest II, Free Realms, PlanetSide 2, and EverQuest Next (although not, oddly enough, EverQuest itself). SOE hopes that ProSiebenSat.1's location and expertise will result in in a greater audience for its games as well as more support and better localization for those under ProSiebenSat.1's umbrella. SOE even hopes that the partnership will result in "special content" for European players.
Previously, SOE had distribution agreements for Europe but nothing on the scale of what it now has with ProSiebenSat.1. It looks like EU players will need to transfer their accounts and characters over to ProSiebenSat.1's domain, although SOE promises that this will be an easy process. It's also important to note that these games and their servers will not interact with their North American counterparts, effectively separating the communities.