Definitely well in the millions, but that's today. If you add world reserve currency status at one point in the future, this domain could very well be a few hundred million dollars at today's purchasing power ratio. It's a powerful weapon for both a good and ill minded entity. In Roger's case it (unfortunately) is being used by an ill minded entity.

What I am more interested in is to find out whether he actually owns the domain in full or not. Before the @Bitcoin Twitter shifted narrative people assumed it was Roger's toy, but turns out it wasn't at all. I wouldn't be too surprised if the same applies to bitcoin dot com.

Too bad for Roger that the whitepaper refers to bitcoin.org which everyone in the space is well aware of.