In 2005, most previous and current champions of all of the racing series in Mexico moved into the series (with the notable absence of open-wheel champions, like Homero Richards), leaving other closed wheel series with young and inexperienced drivers, so the Desafio Corona decided to include those series in a supporting role.
In 2005, most top racers from various Mexican racing categories joined the series (excluding open-wheel champions like Homero Richards), resulting in other closed-wheel series being left with less experienced drivers, which prompted the Desafio Corona to give those series a secondary status.