Kate Beckinsale seems like an obvious choice for Wonder Woman in many ways. If the movie had been made ten years earlier, it would have been even more likely for her to take the role. I'm not saying she's too old for the role, just that her star quality as an action star has been a bit burned since she's done so many 'Underworld' movies. It's hard not to imagine her as a vampire-hunting hero now.
If she can pull off her role as Selene in the Underworld franchise, she could surely hold her own as Wonder Woman. Like I had mentioned, the biggest hurdle is her established connection to an existing franchise. She may have some contracts with the Underworld movies as well that stop her from taking on a role like Wonder Woman.