This is really interesting, and having been on a long journey to nowhere in my organisation, I think I'd start by having written organisational commitment at the highest level to get this done. If it's the CIO leading the project, do they have the CEO or the Chair or the Board's written support to do it (even better all of them). Because if you have a BIG project that takes a LONG time to implement, and a change of personnel happens during that time, they might simply change their minds!! 😭