They can not dominate European basketball as long as spain has the team they have and the rest of major teams participate with their "usual rosters".
They can not dominate world basketball because on top of what i just stated above, you would have to add Argentina, Australia, Brazil, USA.
What they can do though, instead of "dominating", is always being a contender sometimes winning sometimes not as the rest of the teams for medal years after year.
"Dominating" in my humble opinion is an overstatement that comes from the joy of winning a silver medal in this year's tournament.