Indeed, Wanda has indeed a good rouges gallery, more she is given credit for, you also have Amora the Enchantress and Morgan Le Fey and The High Evolutionary and if he comes back Grim Reaper, So Indeed Scarlet Witch has some Great Foes to choice from. You also have the vast armies of the mystical relms and demons that could be a challenge only Scarlet Witch can deal with, so indeed their is much their.
I think this be a good time to for a Book for Scarlet Witch with Avengers 2 coming out and now other Marvel Females doing well in Solo Series as well! ;-)
I would indeed be Beyond Happy if this where to happen!