Birmingham will falter. I saw Krystian Bielik yesterday saying something like "we're too good for League One and will go up" or something. It adds unnecessary pressure and ironically he also said about remaining humble.
Insulting and many clubs will feel provoked by this kind of thing. They'll get the odd draw, some injuries and then the losses will follow around January onwards.
They'll get promoted but on about 95 points.
Updated with source: https://www.bbc.co.uk/sport/football/ar ... y3pj06wkpo