Well we aren't signing 3 Champions League players, 2 initially on loan, all taking low wages with massive promotion bonuses all because they wanted to play for the manager / their agent cajoled them into it. It's written off because it simply won't happen for multiple reasons.
The rest of the squad is repeatable. Players who were already at the club - Costa, Cav, Saiss, Coady, Doherty, a journeyman centre forward - Bonatini, 3 experienced British players Douglas, Ruddy, Bennett.
Oh and you need a manager taking an obvious step down because he's bought into the project.
We aren't that club anymore and it's pointless pretending that we are or hoping we will be again. We can go back up, I don't think we will, but we can, however it'll need to be in a more traditional sense as pretty much every other promoted team outside of Newcastle and ourselves have in the last 15 years or so