Spanish Civil War escalation in Hearts of Iron IV

What happens if the Spanish Civil War triggers an early war between the Allies and Comintern on one side and the Axis on the other?

In the Hearts of Iron IV scenario described, Germany can be overwhelmed in 1937-38 because rearmament is incomplete and Italy often stays out.

The answer is framed as a Hearts of Iron IV scenario rather than a claim that the historical war had a predetermined outcome. Allied and Comintern intervention in 1937 or 1938 catches Germany before its armament program is fully worked up. Italy is expected to remain outside the fight in the game runs described, leaving Germany vulnerable to an early concentrated offensive. The exercise turns the Spanish Civil War into a test of mobilization timing and coalition readiness.