They definitely own them NOW, at least everything from Rome onwards, its just a matter of whether they have the earlier games in the series
Then again, there IS the Total War Eras box set which has the following:
"Total War: Eras gathers Windows-XP-compatible versions of Shogun: Total War, Medieval: Total War and Rome: Total War in one pack for the first time ever, together with their expansion packs - Mongol Invasion, Viking Invasion, Barbarian Invasion and the brand new Alexander. The ultimate collection for any Total War fan, the box includes an exclusive 40-minute documentary on the making of the Total War series, a glossy Art of Total War souvenir book, a CD compilation of the award-winning Total War soundtracks, exclusive art cards and more."
Firstly that implies there might be a single licence holder.
Secondly that would be a sweet pack to have on GOG
captfitz: evil=sinister
genius=mastermind
That was pretty much the way my thought processes ran