It's the double worry whammy: a) make it good, and b) make it successful. Hoping for the best of both!
Yeah, Pine was a good catch. He looks like he'll make a great Steve.
I could be wrong, but I don't think WW is actually a big name for the 30-younger crowd. Yet. Hopefully, her appearance in BvS gives her own movie solid momentum.
And do we know the budget? Will it really be that "big" compared to other super-hero movies? When they parted ways with the last director, it was due, in part, because she wanted to do an "epic" while WB wants more of a character-driven movie. Character-driven can be great, but I can't help but wonder if "character" is due, in part, to wanting a smaller budget. We'll have to wait and see.
I doubt there are many actor-agents in Hollywood that would agree that name doesn't matter. Don't you think Sherlock Homes got a boost for the momentum of RDJ in Iron Man? Would "Lucy" have done as well without Scarlet J. and her name from Avengers? On the flip side, the latest Dr. Doom said he doesn't get as many scripts since Fant4stic bombed.
Name isn't everything, it's certainly not a sure thing. And, of course, marketing and such matter, too. But, I do think actors can bring momentum and excitement based on their performances in previous works, too.