As we know at the Battle of Kinsale, Hugh O'Neill managed to relieve the Spanish forces and achieve victory, setting the stage for further Spanish troops landing and the victory of the Irish rebels, with Hugh O'Neill becoming the first High King of Ireland since 1169.
If O'Neill had failed to relieve the Spanish forces or both forces were defeated, what would that mean for O'Neill's rebellion? What would an English-ruled Ireland look like? Given that Ireland became a rather decent colonial power until its decline in the late 19th and early 20th century, how does this affect world trade and the colonial balance of power?