Had the same issue installing macOS 11.0.1 RC2 and @kmcbride comment allowed me to install.
bridgeOS is on the right version:
System Firmware Version: 1554.50.3.0.0 (iBridge: 18.16.12561.0.0,0)
My previous error message:
Nov 11 10:05:22 osinstallersetupd[779]: bridgeOS update prepare failed: Error Domain=BOSErrorDomain Code=110 "The bridgeOS update doesn't satisfy the given minimum version requirement." UserInfo={bridgeVersion=17.16.16610.0.0,0, minimumVersion=18.16.12561.0.0,0, catalogURL=https://swscan.apple.com/content/catalogs/others/index-11-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog, NSLocalizedDescription=The bridgeOS update doesn't satisfy the given minimum version requirement.}
murdocdv
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Not right now, but check again after WWDC Keynote and/or Platforms State of the Union