Looking at some clips from the Review of the 80s, it looks like they were trying out their fancy new caption generator there going by the way the graphics animate. The new graphics didn't appear on regular editions until the final episode of January 1990 though (which was also the final double headed edition, bar the 1990 Xmas special, until the 1991 revamp)
The opening titles for the Review of the 80s edition were shown at the end of the Story of 1989, so hopefully that's a sign BBC4 will be showing it, though the titles from the 25th birthday edition on the Story of 1988. No questional presenters, clips or acts on the Review of the 80s episode though, and UK Gold did show it back in the 90s.
I thought the Story of 1989 documentary was the least interesting of the TOTP documentaries. Admittedly I was sort of hoping for a behind the scenes on the 1989 title sequence and how that was made, but it’s not iconic or famous like the flying records sequence so I’m not surprised there wasn’t.
One interesting tidbit was Steve Wright contributed to the chart success of ‘The Road to Hell’ by playing the full length version on his show. Shows you how much power the DJs had in influencing what people listened to.
They seem to have got steadily less interesting since around 1985. I'm really hoping the 1991 one is interesting considering the big developments in the show that year.
My main thinking is with it being a special review episode outside of the regular run of the show they might have decided to skip it over, but we'll have to see.
The 30th birthday edition is even more of a curio, as there's no performances, only clips, plus the end credits suggest it was produced by a different production team to the regular show, not even Stan Appel (or Ric Blaxill, though he hadn't quite taken over at that point anyway) are credited.
The first regular edition of 1994 celebrates 30 years too though, with a big "30" in the studio, a birthday cake, a couple of members of Pan's People as guests and a medley of Yellow Pearl, The Wizard and the current theme tune over the credits.