According to Gundam 30th Anniversary website, a short film of gundam titled "Ring of Gundam" will be shown at Gundam Big Expo to be held from August 21st - 23rd. It's produced by director Tomino Yoshiyuki.
"Ring of Gundam" is a tentative title of Turn A Gundam
. It's unknown if the short film is related to Turn A Gundam.
Scan of handbill