King Leonidas and his 300 stumbled upon 300 dead Green Lanterns (Lantern Prime killed them). Curious of the magnificence of the jaded aura rings, Leonidas and his 300 puts them on. By accident, Leonidas opened a portal with the ring. Due to curiosity again, Leonidas and the 300 enter the portal where they see a Rainbow bridge! They see castles straight ahead and Leonidas smiles at his 300.
"TONIGHT! WE DINE!! IN ASGARD!!!!!"
The 300 can use the power of the green lantern rings, but due to lack of future knowledge, they can only use weapons and imagination from their respective time.