The universes have separated again and the brothers resume their conflict, and when Batman and Captain America fail to stop them, the brothers see both heroes' lifes, mainly their inalterable heart and nobility no matter the odds. The brothers stop their fight and for the first time in their whole life, talk, saying the same thing: "You did well". Then they restore both universes to their places.
Wonder Woman casually handing Thor's hammer to him, making him wonder how the heck she could have done that. Well, as seen earlier in the series, Wondy is worthy enough to wield Mjolnir. It doesn't hurt that she's a demigod too.