True Blood vs. Game of Thrones
Every physical being in each realm of fantasy versus each other. No modern weapons. The witches are fair game since you can physically beat the medium but that revenge fire spirit is out. We can argue season 6 baddies such as Warlow, etc. as they come out. We have the humans, Authority, Russell Edgington, etc. to name a few versus the Lannisters , Starks, dragons, and the White Walkers, etc. to name a few for the other side.
Each side in an invasion type thread. Each side is 5 miles apart. No mega weapons or one shot tactics. This is about invasion plain and simple.