Given his intent with this, I would love something like this to make it to the SCOTUS, since the granting of personhood to corporations is absurd and needs to be overruled. Giving a corporation personhood gives it all the rights of being a person with none of the consequences. You can't jail a corporation like you can with people.
Legal person doesn't have all the same rights, for example I don't think corporation can marry, and thus have a right to not testify against it's partner. (I believe married people can plead 5'th in order to not testify against their spouse.)
Please don't take legal advice from this post, it could be utterly wrong.