The Blender Development team start this issue with 8 projects by students and mentors:
The projects have been announced and we are now in the Community Bonding Period.
For a month, students learn about the Blender project, the communication channels and development environment.
This is also the time to make sure that the proposal is clear and has the support of the community.
Coding starts on 27 May.
You can find all info at Google Summer of Code - 2019 Projects
More about the projects area and teams can be seen at devtalk blender development.