Tonight we finally get to see "Wayward Sisters". Current and former cast members and former writers are showing incredible support for the episode and potential spinoff.
Among the people tweeting support are:

Jared Padalecki

Eric Kripke

Matt Cohen

Ruth Connell

Emily Swallow

Samantha Smith 

Shoshannah Stern

Rachel Miner

Mark Sheppard

Richard Speight

Misha Collins ...


Tyler Johnston

Adam Fergus

David Hayden Jones

Rob Benedict

Jenny Klein

Sebastian Roché

and acclaimed author Neil Gaiman
Some samples of the tweets:
 It's great to see all the excitement for this project. Good Luck "Wayward Sisters". "Kick It In the Ass"