User blog comment:MordredH/Morgause in Series 4/@comment-4623180-20120523010729/@comment-5128310-20120523011242

Yep, perhaps.

I'm weary of her returning as an enemy - but more or less as another role. She did have a little bit more involved with Gwaine in the original legends.

I wouldn't put it past the merlin producers in any case, they've continued to surprise us thus far. ;)