I wouldn't consider it 'Bandwagoning' for people to start following a
new team based on hype alone because at least they were there from the beginning unlike an existing team that has just made the finals for the first time. In a Transformers sense, there were quite a few kids at my school in the 80's that hadn't heard of Transformers and therefore knew nothing of them aside from word of mouth i.e. hype, in the school yard (no internet back then - go figure

). Quite a few of them still collect to this day. I would hardly refer to them as Bandwagoners.