The “Firefly” actor’s Green Lantern will first appear in James Gunn’s “Superman” this summer and then join the series.

We had heard that Nathan Fillion might show up as Green Lantern Guy Gardner in HBO's Lanterns series after first debuting in ...

The DC Studios show will see Fillion reprise the role of Guy Gardner, which he will play in this summer's Superman movie.

Nathan Fillion is officially reporising his role of Guy Gardner in DC Studio’s upcoming Lanterns HBO series. Fillion will make his debut as Gardener in James Gunn ’s Superman , and it makes sense that ...