140,000 seems unrealistic; that would make it one of the biggest JW conventions ever. Only a couple of the Yankee Stadium conventions from the 50s and 60s ever exceeded that number, I believe. Even the 1969 Yankee Stadium convention where I was baptized maxed out at only about 120,000.
In other news, I live in NJ about 45 minutes from the Meadowlands, and my daughter came down last weekend from Massachusetts for a visit. She had a great amount of difficulty in locating an affordable hotel room. Now I know why.