Hopefully Batman will only have a cameo role.
Then why the hell would Snyder announce Batman as a lead in the next film if it was to only be a cameo?
I don't know. But i'm guessing you didn't like Man of Steel or Nolan's Batman trilogy?
It wouldn't make sense for the character to be a cameo, when he's been confirmed for a leading role, alongside Superman. I personally was disappointed with how luckluster Man Of Steel turned out (even walking in with low expectations) and seeing it be the opposite of the character and what it means. It was just a poorly made film with poor writing, poor story development, and poor action sequences.
Nolan's first two films in TDK-Trilogy are fantastic, but it ends on a poor, sour note.
Agreed, TDKR was a dull film for the most part, nowhere near as good as the first too. I however, thought Man of Steel was very entertaining. The beginning set on Krypton was a brilliant sequence, it's just a shame that the fight with Zod went on for far too long towards the end.