Thus Spoke Kishibe Rohan (OVA)

Thus Spoke Rohan Kishibe (岸辺露伴は動かない) is an adaptation of the eponymous series of one-shots, Thus Spoke Rohan Kishibe, featuring Diamond is Unbreakable side character, Rohan Kishibe.

The OVA was announced on April 15th, 2016 and will be produced by David Production. The DVD will be made available only to those who have bought the entirety of the JoJo's Bizarre Adventure: Diamond is Unbreakable Blu-ray sets, marking an estimated release date of June 28, 2017.

Plot
The story centers around Rohan Kishibe and his miscellaneous adventures, ending up in bizarre situations or meeting intriguing people. It's currently unknown if the OVA will adapt one of the previously written one-shot stories or will feature an entirely new one.