they showed us the best aspects of all the games, especially the sixth installment: the landscapes are very well-developed. by the way, it looks great.

I doubt that anyone still cares about this; we've already seen better landscapes in the past two years. It would have been nice if they had shown us a new landscape, but they keep using the old stuff. For complete happiness, all they need to do is release a screenshot of duels between the old factions; that would also be quite interesting.
However, they've already done their job: personally, I've stopped waiting for the expansion; I don't care when it comes out. Only the first few games will feel unusual with the new content, but after that, it will be the same as always: boring. The gameplay remains unchanged, and that's where the main problem with the sixth installment lies. Even if they add all 9 factions, it won't reduce the monotony. Over time, I realized that the strategic and tactical aspects are much weaker here than in the previous installments (I know, I'm slow). It's bland and simple, a complete casual experience.