Like you, Frank, I cannot see much point in Hornby producing a BR10. If it is the old Rivarossi model, it is overscale (but is likely to be cheaper than Matrix?).
A new BR58 would be nice. I have the old Roco model, but it is not very good at pulling decent length trains.
The BR18 is, I believe, the BR18.5, which is not made. I would welcome this, as it suits my period better than either the Roco or Fleischmann BR18's. I think Hornby might want to look at the tender, though. As far as I can make out, the old Rivarossi BR18.5 could only be one of two locos (18.537/ with the tender supplied. But I would be most happy if someone can tell me I'm wrong and put me right.

Sets of "standard" goods wagons with different numbers sounds a great idea. Weathered, possibly. Perhaps Brawa will give us a set of G10s - perhaps a set of 6 with and without brakesmans cabin?

Back to Hornby - perhaps they will reintroduce the Swiss RAe TEE set for the 50 years of TEE. No-one else has produced the set in affordable form and it worked in a variety of countries.

John