I've never seen anything other than that one tweet confirming who the new controller is. I really can't imagine anyone paying more than Roger to fuck with us so my assumption is that the original owner got sick of it all and took it back.
It's possible Blockstream is funding it but I'd hope they had better things to do.
theymos's perspective on this matter;
https://bitcointalk.org/index.php?topic=5177423.msg52219756#msg52219756I think that people severely overestimate Roger's wealth. It has been more than clear that he spent most of his Bitcoin and very likely fiat buying Bcash. If you also take into consideration the money that the spends on marketing, dozens of employees he pays (employees of a business that generates little to no profit), it becomes clear that he can't just recklessly spend money left and right anymore.
As for Blockstream funding it, I seriously doubt it with how Adam Back (CEO of Blockstream) was just as surprised and suspicious as anyone else.