The Jem’Hadar and Federation join forces? To destroy other Jem’Hadar and stop them from using some crazy Macguffin that was last seen in TNG season 2.
There’s a few unexplained moments here – like how the rebel Jem’Hadar are able to fight without Ketracel White – but we’ll let that slide. (Okay, we can’t really let it slide, so we started this thread.)
All I know is that Jeffrey Combs shows up as a Vorta and it is awesome.