If Faora (a character with almost no given backstory in the movie) was given some of the most badass fight scenes in the entire film.... I'm pretty sure Wonder Woman will get one or two cool moments.
As for Batman I hope they don't OVERPOWER him in the giant Metal suit... maybe make it so that it's obvious he's barely keeping up against Supes and is using everything he has at his disposal. For example. When he punches Supes in the suit... maybe have the arm's metal start to chip or break. Then he switches to another gadget,,, then ANOTHER gadget... then ANOTHER gadget! Just make it balanced. Maybe when they FIRST meet... Bats is caught unaware. Maybe he gets one good hit in (i,e: That sonic cannon) but he's swiftly defeated and barely gets away. THEN when he's had a decent amount of time to prepare and lick his wounds THEN he gets a TON of good hits in.