You know i'm not the guy to "sell the bearskin before it is shot" (it's a Dutch saying, to not get ahead of oneself) but that ITT was only a 9k ITT. It was also prior to his 3rd place in the Belgian Nationals ITT, before his ECC ITT win, before his silver medal in the WCC ITT and his destructing ITT in San Juan. It's also not like he was completely blown away there. He finished 4th at 3 seconds of Wellens and 1 second behind Campenaerts.
Schachmann seems like a good ITT'er, but not worldclass like Remco has proven to be. He's only ever won one ITT, last year, of 11k. Two years ago, in Algarve, he lost 1m15s to Thomas. Unless Evenepoel has a complete off-day, crashes or has 2 punctures, i'm not seeing Schachmann take it away from him. And if he indeed crashes or punctures, it doesn't really matter how good Schachmann is, or who is next in GC.