Some quick notes on the soundcheck: This is how I noted it:
new (Page?) song
new (Mike?) song
Show of Life x2
Burn That Bridge x.1.5
There were two songs that started the soundcheck in Chicago: Page sang the first song, which after hearing the 6/19 SPAC show, I'm reasonably confident was "Halfway to the Moon." I can remember hearing the bent guitar pitches while standing outside of Toyota Park that afternoon
During the new Mike tune it sounded like perhaps they were repeating sections of a song rather than running the entire thing start to finish. This may or may not have been "Idea" - it's impossible to know now without hearing it again - but it was one that Mike was singing.
Then, the 3rd song was "Show of Life" (twice) and finally "Burn That Bridge" (twice...one and-a-half times, really).