Complex sentence: After an eighth season of the show was confirmed, the mythology for the series changed, focusing largely on the search for Mulder in the first half and the introduction of the "Super Soldiers" in the second half.
Split into simpler sentences: After an eighth season of the show was confirmed, the mythology for the series changed. In the eight season of the series, the mythology focused largely on the search for Mulder in the first half and the introduction of the "Super Soldiers" in the second half.