Silver and robin

Hope is dick's little sister. Durn the night they are known as silver and robin. most of the leuge doesn't even know they exist. The few that do certainly don't know that there just kids. But durn an accident at Star Labs the two syblins are thrown into another dimension, where the Leuge doesn't even exist. Instead a group of hero's called the Avengers do, and they are hunting silver and robin down. Back home batman frantically searches for his two young protégé. But when he had no luck will he have to ask the leuge for help? How will they feel about two kids fighting crime? And will Robin and Silver ever make it home?