Supernatural is one of the shows that will appear at PaleyFest this spring.
From the PaleyFest Site
What is PaleyFest?
The 35th Annual William S. Paley Television Festival in Los Angeles returns to the world-renowned Dolby Theatre March 16 to 25, 2018. This is your chance to see some of your favorite stars IN PERSON and watch your favorite shows on the big screen along with other ultimate fans, followed by a moderated Q&A with members of the cast and creative team. Named for William S. Paley, founder of CBS and The Paley Center for Media, proceeds from the event support the nonprofit Paley Center.
This will be Supernatural's third appearance at PaleyFest. Previous appearances were in 2006 and once in 2011
Here is the full lineup of shows at this year's event

March 16: Icon Tribute to Barbra Streisand (7:30 pm)

March 17: Fox’s The Orville (2 pm)

March 17: NBC’s Will & Grace (7 pm)

March 18: Hulu’s The Handmaid’s Tale (2 pm)

March 18: HBO’s Silicon Valley (7 pm)

March 20: CW’s Supernatural (6:45 pm)

March 21: CBS’ The Big Bang Theory and Young Sheldon (7:30 pm)

March 22: ABC’s The Good Doctor (7:30 pm)

March 24: CBS’ Mom (2 pm)

March 24: OWN’s Queen Sugar (7 pm)

March 25: CW’s Riverdale (2 pm)

March 25: Netflix’s Stranger Things (7 pm)

Superwiki notes how unusual this invite is.
Supernatural returns to PaleyFest in 2018! One of the few shows to have repeat invitations to the TV festival of the Paley Centre for Media , it is the only show to have three panels while it is still on the air! No guests confirmed at present but the panel will be a mix of actors and writers/producers.
We are in good company. This is quite an honor to be selected.