I was trying to think of how DCA could return to more traditional Disney roots.
I realized that one thing DL has that DCA doesnt, is the attraction posters. Which help get people excited for the adventures inside the park.
I was thinking it might be a nice translation for California Adventure if they installed similar posters under the Golden Gate bridge, as that sort of serves as the same entrance way into the park.
Perhaps to make the concept more unique, instead of posters for specific areas, they could have them advertise the various areas of "california". They could theme them to look like vintage travel posters.
They could include...
Hollywood Tower of Terror
Flick's Fun Fair/ Bountiful Valley
Grizzly Peak Recreation Area
The Bay Area
And if they later retheme the plaza to look like the transportation hub we heard about earlier, the posters would fit perfectly.