Complex sentence: Therefore, a featherweight bout between Max Holloway and former UFC Lightweight Champion Anthony Pettis was shifted to the headlining spot and promoted to an interim UFC Featherweight Championship status.
Split into simpler sentences: Therefore, a featherweight bout between Max Holloway and former UFC Lightweight Champion Anthony Pettis was shifted to the headlining spot. Another component was added to the fight, as it was promoted to an interim UFC Featherweight Championship status.