Complex sentence: Shortly after, the drummer Steve left the band and in December 2007 was replaced by another Strapping Young Lad former member, the drummer Gene Hoglan in time to start the recordings for the new album.
Split into simpler sentences: Shortly after, drummer Steve left the band and in December 2007 was replaced by Gene Hoglan, another former Strapping Young Lad member. Gene joined in time to start the recordings for the new album.