If you wish to give a small session,please reply back to this thread or send me an email off list.
I would like to introduce Modularity [1] and project Boltron[2] to contributors as these are the next big changes that are targeted to be implemented in release 27.
As you said we won't be focusing more on stuffs other than new changes, I can wrap up my Introductory session in 15-20 minutes.

[1] https://fedoraproject.org/wiki/Modularity
[2] https://fedoraproject.org/wiki/Changes/Modular_Server_Preview 

Vipul Siddharth
Intern, Red Hat
Mob: +91 8971357273
Web: vipulsiddharth.blogspot.in/