With advancing technology, growing population, and increased accessibility, there is an ever-growing need for energy to power our world. Meeting the increased demand is challenged by stringent environmental constraints and the time to implement new energy sources, all while doing so in a cost-efficient manner. To assist decision makers in forecasting what the energy production future should look like, a framework is developed that can account for these factors. With flexible parameters for power production assets and energy constraints, varying energy mixes can be evaluated against each other. Through two initial investigations, this advises that changes to the energy mix begin to occur sooner rather than later to reduce long term costs and emissions. With the tuning of this framework, specific energy mix prediction cases can be assessed and utilized by decision makers to guide investment and policy for the far future.