Charlton, Southampton and Norwich will all ply their trade in the third tier after suffering relegation from the Championship.
Moore faces a huge task to ensure his side remain a competitive force after they narrowly failed to make the play-offs this season.
He told the Liverpool Echo: "A lot of the clubs at our level will be in the same boat.
"But the clubs coming down from the Championship - Norwich, Southampton and Charlton - will have a financial advantage and only one out of MK Dons, Millwall, Leeds and Scunthorpe will be going up.
"So it is going to be a very competitive division with some big clubs in it next season."