First Jack, then Rory, now Clara... I don't know how many more constantly dying companions I can handle! Just watched the new episode with my brother and while I'm sad to see the tweed jacket go, I'm excited for what's to come!
We did get a glimpse of UNIT again in the new episode.... so maybe more Torchwood? I think it's a long shot, but maybe.
Well, UNIT has been around in the Whoniverse since the 1960s so I'm not sure that's going to be a direct indicator of anything to do with Torchwood, which was first mentioned in 2005.
That being said, I remember right around the time Miracle Day ended reading an interview with Russell Davies where he said that he was uncertain to the future of Torchwood, but had "one more Gwen story" he wanted to tell. Whatever that means.