Star Trek: The Original Series
Yep, besides some of the (hate to use this word but it is meant in a positive way) campy nature, it seems to take some TOS plot-lines. Putting different aliens on a planet to fight it out, for example, seems to be a bigger take on Arena, not to mention, the major antagonist alien has a passing resemblance to Gorn. A motorcycle on the alien planet? I guess we'll have to wait and see how that comes about but could there be shades of Miri in this as well?
Maybe wishful thinking but with Pegg as the writer, there is a new hope (sorry, couldn't resist). He is a major geek and probably knows TOS by heart.