Anyway my first memory of that line being changed by the players was in 1993. We were on top of the ladder most of the year and it rhymed well, they sang it after every win. They kept doing it in the following years, even though none of them rhymed with the rest of the song.
Sorry to intrude - I remember the "premiers in 19....90....3", followed by the weird "1994" the next year but then never took much notice after that.
We had North's theme song as the club song for my cricket team as a kid. We always sang "just you wait and see" - I thought those were the actual words until right now.