Yep, I called it right months ago: Giovanni runs back to Kanto like the chump he is, and the TRio stays in Unova to chase Pikachu because it's about all they know in life. Exactly how competent they'll remain now remains to be seen.
Also, people do realize that since the beginning, the TRio was meant to be the show's Dorombo Gang: the incompetent trio of villains that exist solely to be humiliated and defeated in every single episode. Japan really loves those kinds of villains, BTW, as you see similiar trios in all kinds of Japanese media (Megaman Legends, FFX-2, etc).
Gen1 Pokedex: 151/151
Gen2 Pokedex: 251/251
Gen3 Pokedex: 386/386
Gen4 Pokedex: 493/493
Gen5 Pokedex: 649/649