I couldn't find a specific thread about this, but if I missed it mods please merge.
Dorothy’s Ruby Red Slippers Surrender Smithsonian Space to Indiana Jones
The museum will be replacing the “Wizard of Oz” slipper display with signature items worn by Harrison Ford in the four Indiana Jones films. Artifacts associated with the fictional archeologist in the adventure film series have been on display before, and Indy’s whip and fedora are returning April 24.
Based on the short note in the Exhibitions section of the main site, I take it that only the whip and fedora had been on display before, while the linked article seems to hint at a larger number of items to be added, hopefully this will prove correct.
Worst case scenario, we can update the thread title to "Indy back at the Smithsonian"...