The sale of England's national stadium will be voted on by the FA Council on October 24th, with Fulham owner Shahid Khan the interested buyer.
The FA have claimed the money they recieve - over €600m - will be used to improve the grassroots game in England over a 20-year period, while England would continue to play at the famous stadium.
However, Neville tweeted on Saturday coming out against the deal, saying he could not make sense of of it.
"The numbers are bizarre. The most bizarre is how they supposedly grow the sale proceeds per annum post sale," he said.
"Who are they banking/investing with? They point towards match funding potential but no one can see where and how?
"This sale can't go through. It's short-term thinking and I'm sure will be blocked by councillors once they start to delve into the detail.
"That money will be gone inside 10 years with little impact. In 20 years it will be 'How did that sale ever go through?'"