Worthiness
In Marvel, Thor is "worthy" so he can lift mjolnir. In DC, Hal Jordan was selected to receive the ring and become the Green Lantern of earth.
But in a world of amazing and courageous heroes what makes them so special over all the others? How is Thor more worthy than dozens of other heroes who can't lift the hammer? Or why did the ring go to Hal and not someone else on earth?
And if he is so special, could Hal Jordan lift the hammer? Or if Thor was in DC would the ring have passed over Jordan and gone to him?
Who do you think should have these guys beat in the worthiness department?