Complex sentence: Much like the mainstream New Earth/Post-Crisis Batman, Miller's Batman begins his journey after his parents are murdered by a two-bit thief, however in "Dark Knight Strikes Again" it is hinted that he never found out who did it.
Split into simpler sentences: Much like the mainstream New Earth/Post-Crisis Batman, Miller's Batman begins his journey after his parents are murdered by a two-bit thief. It is hinted in "Dark Knight Strikes Again" that he never found out who did it.