As a lead up to Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire, Toei have released a two part OVA featuring the Ultra Galaxy cast and Ultraman Zero. This is set after the second series of Ultra Galaxy, but if you've seen Mega Monster Battle: Ultra Galaxy Legend The Movie(and you should), then there's no spoilers (not that there really are any kind of spoilers).
Special thanks to our friends at TokuRiders.
Megaupload