When the Sixth Circuit granted en banc rehearing to In Re: Ohio Execution Protocol, 17-3076, it scheduled argument in the very same order: June 14, 2017.
Now, there's our double-header, on October 11, 2017: Turner v. United States, 15-6060, the right to counsel pre-indictment case, in the morning, and United States v. Gibson, 15-6122, the "how much drugs for the puny co-defendant" case in the afternoon.
All three of these cases were granted en banc rehearing in 2017.
Sitting in a corner somewhere, singing "The Cheese Stands Alone," is United States v. Stitt, No. 14-6158, concerning whether Tennessee aggravated burglary is a violent felony. It was granted en banc rehearing on April 27, 2016. Mathis v. United States, 136 S. Ct. 2243 (2016), effectively reset the briefing schedule. That schedule ended in early September 2016. There has been a trickle of 28(j) letters since, with the Fourth Circuit's opinion in United States v. White, 836 F.3d 437 (4th Cir. 2016) (holding West Virginia's burglary statute is overbroad) in September 2016 and the Eighth Circuit's opinion in United States v. Simms, No. 16-1233, 2017 WL 1500308 (8th Cir. 2017) (holding same of Arkansas burglary). The government filed a hopeful, "hey this is when I'm not available in June and July," notice in January. There's still a chance of argument sometime in the fall, but it is probably more reasonable to contemplate a winter or spring sitting.