So trains are't running this weekend so they put on buses instead. But according to the replacement bus timetable, the only buses after the game are every hour from 7:07pm.
http://www.maxx.co.nz/media/98377/vt_wl_tt_2013.02.02-03_v3_a4_final.pdf
edit: might be wrong on that front. There is a bullet point not on the timetable that says buses will leave as required.