The new look that Elsa gets in the "Frozen 2" movie final is very beautyfull and very symbolic. She let her hair down and accepted herself for who she is. And the shiny patterns on her silver dress unite the symbols of all four elements. Elsa's new Snow Queen look is incredibly beautiful and unearthly. Maybe that's what the image of the fifth element and the bridge should be like. So far, it is impossible to find high-quality promotional images of Elsa's new outfit on the net.
But there are some, after all. And they are all yourth: