"Good. I think you'll find the maps of the Rift's n-dimensional topography very interesting."

He's been a busy little Satan. After all, he has a tragedy that's going to happen back home in, from his perspective, the near future, and he needs to get back so that he can find a way to avert it. Satan he might be, but even he doesn't want an empty Heaven and the corpses of his brothers littering the Earth. And if that means that he has to find a way to literally crawl out of the bowels of Hell to find the ones responsible, than the Winchesters better watch out, because they're in for a fun, Devil-shaped surprise coming to a reality near them.

"I trust you've been keeping yourself occupied, as well?"