Well....this could very occur over a 30-day period, and people would go NUTs over the fairly quick success.
Greenland? I suspect a meeting is likely to occur (probably by mid-Feb) with Greenlands Premier (Jens-Frederik Nielsen), and Rubio. A relationship discussion will occur, with the discussion of a Compact (agreement)....ONLY between Greenland and the US (not Denmark). Some services offered free of charge....some 'fee' paid to Greenland (likely three billion-plus a year). Denmark will argue they don't have the power.....Nielsen will counter.....they always had the power. In the end....around 10,000 US troops will be based out of Greenland.
In case you were interested....Denmark 'gives' Greenland around 500-to-600 million dollars per year. If you do the math....every citizen could get an expense account of $100k a year of 'help'.
Cuba? I think Rubio will simply show up....offer a deal where you offer free-and-open elections, and the US will stage 20-odd pocket-nuclear-reactors to finally give Cuba 24-hour round-the-clock electricity.....with half-a-billion a year staged for upgrading the grid. I think Cuba will hype-up the election....have it before July, and go resolve their mess. Some plaza in Havana will be renamed Plaza-de-Rubio to honor the guy....with a statue of Trump flown in from Miami. Icing on the cake? Trump will promise Havana a major league baseball team within three years.
Iran? Special Forces arrive in Tehran for a 72-hour operation.....with 90-percent of the Mullah guys sent packing (probably to Moscow). Another plaza will be named after Rubio-Trump.
Columbia? The President of Columbia boards to some plane to leave, and the country stages a fresh new election....by mid-summer. Another plaza will be named after Rubio-Trump.
Here's the thing....that's just for 2026. What's on the schedule for 2027 or 2028? This is like professional wrestling....there's more bouts to come.