If someone wanted to model the interior of the superdome and all the overpasses and such sure this would be possible.
For shits and giggles, I found a model of the Rungrado 1st of May Stadium in North Korea on 3dWarehouse and used that to mock up a Coliseum style track inside of it to see if the world's second largest stadium by seating capacity (behind the Narenda Modi stadium in India) could fit a really small track inside of it like the Coliseum. The answer to that is yes, and quite comfortably. Am I planning on releasing it? ... Probably not, honestly, the model looks a bit janky (especially considering the Rungrado 1st of May Stadium itself looks quite nice).
I think something like one in a cricket ground might be more feasible because those are generally larger than soccer fields.