Exactly! That’s what we had originally in the US, and I thought that was more than fair. I would add that the renewal should only be awarded if they can prove they need more time to recoup R&D costs and it’s still available commercially.

So yeah, something in the neighborhood of 10-15 years w/ a renewal sounds totally fair to me. Let them keep the trademarks and whatnot as long as they’re in use (e.g. you shouldn’t be able to make a new entry in a series w/o the author’s permission for the marks, but fanfic that explicitly mentions it’s not original/canon would probably fall under fair use), but the actual copyright should expire very quickly.