I know it's not much, but it looked cool. Seeing those guys in 3D summoning their weathers will be great. This is likely just a small chunk of a bigger more epic set of cutscenes that will make hoenn fans have the feels.
I'm usually disappointed by the cutscenes. They're too short most of the time and feel out of place.
The best one imo was N's castle.
But the legendaries' cutscenes I usually don't like.