Wow, first time back on the internet in 4 weeks, and a new PV is waiting for me!

The two biggest takeaways from me, is that, we are are going to see almost the entire main cast of GXP (unless Gyoukuren will be show up in the ep proper) with Seina at least having some alone time with the cabbit girls, which will hopefully give us some backstory and plot details of the Yamada harem. After all these years, the idea of a grown up Fuku will take some getting used to.
The other big thing, of course, is that we're getting some honest to goodness ACTION again! To be fair, it's older Tenchi vs. space pirates. Not exactly a high stakes fight. But at least we'll stuff happening on screen. It's a very good sign. OVA 5 won't just be a bunch of talking head scenes.