Ultraman Tiga Gaiden: Revival of the Ancient Giant (2001)

Set many years after the end of the original Ultraman Tiga series, in which Daigo Madoka (human host of Ultraman Tiga) has a son with Rena, named Tsubasa Madoka. Tsubasa is a member of a new team, Neo Super GUTS, the successor to the original Super GUTS.