Marvel Movies Vs. DC Movies

Today I heard that Jaimie Alexander was a possibility to play Wonder Woman for the DC Comics movies.  She's played Lady Sif in the Thor movies, and is on this new show Blindspot.  I was trying to figure out why she wasn't playing the part.  According to the article I saw, they obviously didn't pick her, especially since by now, we know they casted Gal Gadot instead.  I'm trying to figure what the hell DC does with its movie.  Marvel has managed to make excellent casting choices and has even been able to bring some of their secondary characters and make them first stringers.  With the Batman vs. Superman movie due out in about a month, people are still cringing over Ben Affleck being cars as Batman, and Jesse Eisenberg as Lex Luthor.  I've literally no idea why they've got Zack Synder directing this thing.  I mean, holy hell, Jaimie Alexander would've been perfect, she has the right look, and already has the whole ability to fight thing down, as this article I read points out.  I don't understand why DC makes such obvious mistakes.  They should've kept Christian Bale as Batman too, even if he didn't want to do it anymore, you throw enough money at him till he agrees.  They made a ton of money with the Dark Knight trilogy, but hey, why continue success, when you can throw a huge turd on the wall to see if it sticks?