I asked Rob McClure at stage door of Something Rotten before it closed if it was coming to Philly on tour and he said it would but not until after the year mark. Kimmel Center hasn't announced their season yet and won't for at least another few months.
Ooh! Thanks for posting this, I will definitely be going to this. I assume they'll announce a line up at a later time but it does mention that it will include performers from Hamilton, Book of Mormon, Wicked, etc.
^That seems very strange, but then again I'm used to the Kimmel Center and Broadway Philadelphia having all of the Broadway performances as part of the Broadway season. I also swore I saw someone from Broadway in Boston sitting at one of the tables when I walked in.
I saw Ryan as Jerry in Philly while the tour was here in November and he was wonderful. His voice was pleasant, he had a lot of charm, had great chemistry with Sara, and danced (as predicted) the hell out of the role.
When we did the show as a summer production back in 2006, our version was based on the national tour script and the opening was done with Mary having the nightmare as the Lennoxs and their friends play a game of drop the handkerchief with the handkerchiefs being red representing the cholera. I'm not sure how the original production did it, but the DC production's opening was very well done (The dinner party leading into all of them dying of Cholera).
I went to see the show the weekend before Christmas (December 17th) evening and everyone came out including Ben and he took photos and signed. My guess is he wouldn't stage door a matinee on a two show day, but that's just my assumption due to the demand of the role on him.
It was noted by someone who works at School of Rock that there isn't rush available during the holiday season and with Something Rotten closing on New Year's Day I feel like that will be fairly busy but 6am seems like it would work out for you.
You also could try the digital lottery for Great Comet and Something Rotten among others.
Edit: Waitress has standing room, which is available when the performance is sold out. Same for Dear Evan Hansen, but giv