I know this sounds strange, but hear me out. In 1910 Germans in Haiti, despite only consisting of a few hundred, controlled 80% of Haiti’s International Commerce. What if these German businessmen pull a Hawaii and ask Germany to become a protectorate, or even annexation?
To have this work let us assume 2 POD's; 1, No Monroe Doctrine or any similar treaty, and 2, far better US German relations.
What might the effects of a German colony in the Caribbean affect the region?