Oh that's hard...
Maybe he'll turn out bad, but Merlin will make him good again...somehow. Perhaps he'll show him what he's destroying and make him feel guilty, or he'll find out why he wants to destroy Camelot and sort out the problem another way.
u will will never know until u see it, but there is a good chance of him turning out bad considering that he knew that merlins mum would die and he didnt tell him in season one
Merlin has control over him, so even if he turns out to be evil, it will not matter because he has to obey Merlin. I think during the last episode he was fulled with rage, but now he is not technically "good" but more resigned. Although, he did help Merlin in the first two series, so without him, Camelot would have fallen. Does that make him "good" though?
