[Not really sure if this is a "session" as opposed to some other kind of activity, but…]
Collaborative work time to get started (or finished) on porting a module to D8.
If you've got a D7 (or earlier) module that you'd like to move to D8 this is a great place to dig into the work. [Mention relevant sessions here – assuming there will be at least one…] We'll start with a brief review of porting strategy and some of the big changes between D7 and D8 and then dig into the work.
[I'm not an expert on this at all, I would see my role as facilitating / doing some of the introductory presentation. If this gets approved I'd go looking for people with more experience who would be willing to help out.]