Colombia, when its history as a whole is taken into account, not just the short historiographical period of "Gran Colombia", does have various i teresting leader choices, especially now that leaders are not always heads of State. Policarpa Salavarrieta, women spy and fighter during Colombia's independence, and Santander, Bolívar's VP and later president. Sadly, those won't happen, due to Bolívar being announced.
However, I do find likely that a future Colombia civilization is introduced later on, encompassing not only the Gran Colombia period (1819-1831), but its whole history (1810-present). After all, "Gran Colombia" was never a thing per se, it was just a name for a time period in the history of Colombia, the country never had that name and no one called it "Gran Colombia" until a few decades later, it was just Colombia, it never stopped existing, it just shrank in size, but it was the same Republic of Colombia, same capital, legal system, presidential list, etc. that still exists today and that has existed for 200 years (plus 300 years if you count its colonial history as New Granada).
Detaching Bolívar from it might allow a more culture and agriculture centred Colombian than its Civ6 militaristic portrayal.