Why would Disney want to buy out Pat Roberston? I honestly do not see how he'd fit into any of the theme parks. I don't know the laws 100%, but I know what you're saying though. Disney is limited to using Marvel characters/rides
outside of the Orlando parks due to the extensive contract with Universal holding the theme park rights. Whereas Universal, and
only Universal gets to decide if/when to give those rights Disney. Universal can also choose not to at all, causing Disney to only be able to use Marvel inside it's CA parks, and other locations abroad. I kinda get that part. Pat Robertson, on the other hand, is signed with ABC Family (which is owned by Disney), and they could put Robertson's merch, appearance, or theme into a ride if they chose to. Nothing against Robertson, but I really don't think his theme would be Disney enough for one of the parks, but selling his books, merch, etc (like they do for Marvel characters) outside of the parks seems more fitting.
If anything Marvel or Robertson (attraction-wise) is added, I still vote for (and have always voted for) DHS. To me that park is lacking considering it's age, and lack of major additions based on a 2-decade+ old theme park, and neither Robertson or Marvel really fit in to DAK's atmosphere. Then again, neither does Avatar, but....