The article mentions it's "satirical" at the end, so I don't believe it, but it's a fun thought exercise.
On the one hand, there's no way Disney could be worse than Warner Bros, so I'd be happy if it happened. On the other hand, this fake deal makes it sound like Disney would buy the full rights from WB and Jo - and that'd be bad, because Jo still exercises some control and restraint with the brand (though less with every year). Disney would go hogwild and overdo it with HP, just like they did with Marvel.
So I'm thrilled if Disney just buys WB's rights, but devastated if they also buy Jo's to claim full control. (I also don't think Jo would sell her rights, even for the nigh infinite sum that Disney would offer.)