Why use a Shell Company Registrar in Nevada & a Virtual Office unless you're trying to Hide A LOT.
There are good reasons a company would register in Nevada and then have a virtual office. You will find a lot of companies are organized in Nevada and Delaware because they used to offer the strictest laws regarding protecting the privacy of company owners. So, if a business is organized in Nevada but operated out of New York and the owners wanted to maintain their privacy, they use a virtual office.
I operate a company in Canada, but I don't live there, so I have a virtual office. Not becuase I'm protecting my privacy, but because legally I am required to maintain an office.
I'm not saying there isn't something fishy going on, I don't know. But what has been laid out so far doesn't raise any red flags to me. Individuals with a lot of money often organize multiple business entities that then work together as part of their tax planning. It could just be that the owners of Watchtower Inc. have nothing to do with THE Watchtower but chose that name because they were across the street.
Anyway, there might be something going on, but I just wanted to point out that these things I commented on do not in and of themselves mean anything suspect is happening.