I'm not fluent, but my curiosity got the better of me.
...so, Tenchi insta-kills the Borg...
At least watching the raw allows me to be one of the first to make a joke like that.

Wedding prep or not, the point of the entire OVA seems to preparing Kenshi. It will certainly feature sending him off. My question is whether or not they will also feature them bringing him back.
This episode also seems to confirm another consistent feature- showing what happens AFTER a story line told elsewhere without revealing the details of that story.
Since time goes so quickly on the other side, all of the events in Geminar could have spanned a couple days on their side. They could bring Kenshi back a week after they send him and Kenshi would return the oldest and most battle-hardened of the bunch-- with more kids than Tenchi OR Seina.
So, this series could very well end with them retrieving him.
I also am slightly curious if they do something else... might the solution be to do a "Dual" and merge the Dimensions?
I know... big problems with that. In order to merge the dimensions the two before had to be destroyed. And if certain hints are to believed, Geminar is a far-faaaaaaaaar future version of Photon's "Sandy Planet"... which was shown to be a version of Earth.
I still think it's an option. Kajashima isn't usually into breaking parties up and while leaving Kenshi on Geminar would mean he loses his Tenchi family, bringing him back means Kenshi loses everyone he loves on that side.