When it comes to Ryback, I think there's potential there. Ryback does have a great look, his intensity is spot on and he's not a lumbering & clumsy ox inside the ring. He's a huge man, but he has a good deal of athletic ability for a guy his size. Based on what I've read about the guy, Vince wants to stick with the Goldberg theme for Ryback. It's gotten a good response overall and Ryback looks impressive. I agree that it's time to move Ryback onto something else, at least something against a reasonable opponent. At the same time, however, it's hard to really fault WWE for taking their time with him. I'd rather they take too long with someone than rush a guy through into a program or a push before he's ready.
As for Mason Ryan, I don't think he has an especially bright future. Vince is said to be crazy about his look but he can't ignore just how limited Ryan is. With the way WWE is set up right now, especially with Triple H being in his ear, Vince doesn't go as gaga over guys with the bodybuilder look as he used to. It might be something that he personally likes in a wrestler, but Vince always goes where the money is and there's no money in Mason Ryan. He has a great physical look, but he's extremely slow, clumsy, awkward and just not very skilled in the ring.
Forming a team between these two would generate little to no interest I think. Ryback is someone that's slowly on the rise and has the potential to go somewhere while Ryan comes across as 320 pounds of dead weight that Ryback doesn't need. As others have pointed out, Ryan is someone that's already jobbed out on Superstars several times already, so that's an indicator that he's not a priority right now. Of the two guys, Ryback easily has the most potential, but I don't see him as the face of the company. He still has to be proven and it's difficult to really get on board with him without seeing him against a real opponent. As for Mason Ryan, he might look a lot like Batista but he makes Batista look like Kurt Angle when it comes to overall ability.
