I will say this... if there's anything that gives me hope it's that Chris Terrio took over the script from David Goyer, and has been shepherding this project - along with Justice League - ever since. Terrio wrote Argo, won an Oscar for that screenplay, and was brought on by Affleck, once Affleck was cast. From all accounts, Terrio is super smart (way smarter than Goyer), and has delivered something everyone involved apparently loves. I also think Affleck is doing everything in his power to make this a great movie. He has A LOT riding on it, and is extremely involved in every aspect. Not to mention, Snyder is a phenomenal visual director. The problem is, he's never had a great script, nor are his strength on the page. I'm hoping against hope that he finally has a great script with Terrio now onboard, and if so, this movie could truly be something special.
Additionally, there hasn't been a single thing I've heard/seen about Batman in this iteration that gives me pause. His look, his car, his backstory, how they're using him, and the point at which we're meeting him in his career, all sound pretty damn cool to me. And Affleck doesn't bother me in the slightest. I think he'll make for a great Bruce Wayne, and his grizzled old Batman could be pretty cool, too. Despite my lukewarm reaction to Man of Steel, Cavill too I thought was a great Superman. The dude embodies that character perfectly. Even Eisenberg's Luthor sounds like an inventive take, and I applaud them for taking that kind of a chance with the character.
All that said, whether or not all these ingredients mix together well is the key. Individually, I love pizza, I love burritos, and I love hamburgers, but not all at once, no matter how great the chef is. But as gross as all that sounds together, I'm not ruling out the chance that they've managed to come up with some kind of awesome pizza/burrito/hamburger hybrid. It's definitely not likely, but when the entire restaurant depends on that one hybrid menu item being a success, I'd like to think a lot of extra time and consideration has gone into preparing it. And judging by the sound of things, they've taken their time getting it exactly right. I just have no idea if my taste buds are ready.