According to unattributed images circulating online, the Central Bank of Bahrain is apparently planning to introduce 10- and 20-dinar banknotes like the current issues (B304 and B305), but with enhanced security features (Orbital SPARK instead of holographic patch on front, and possibly Motion threads on back) and slight redesigns. It’s unclear if the other denominations issued in March 2008 will also be revised, or when the new notes will be issued.
Courtesy of Yaqoob AlShaer.