"When Jerusalem will flourish, Medina will fall.
When Medina will fall, huge war will start..."
Part of a hadith from Abu-Daud.
Jerusalem didn't flourish till date as Israelis wanted to keep it the old way. The old culture, constructions, roads and markets.
We Muslims trend to believe that flourishment has to come in Jerusalem under Muslim rule.
That might or might not be the case.
Next watch if the new "undivided capital" of Israel start to flourish and to what degree.