According to Dengeki Hobby Magazine December issue, a new OVA of Armored Trooper Votoms
series was announced to be released next Spring. It will be the final chapter of the series. The article says the new OVA "Gen-ei hen" is probably a sequel to Armored Trooper Votoms: The Brilliant Heretic
. The character designs show matured Vanilla Vartla
and aged Bouleuse Gotho
Source: Scan of Dengeki Hobby Magazine
According to Anime!Anime!, the new OVA is a six-volume series and the first volume will be released on March 26th, 2010.