I you like Amethyst, buy 'em... and then send me the second best copy you have However I doubt this character will take off in a big way nor be introduced into the DC movies. They've already introduced Enchantress and something tells me she won't feature as prominently as rumoured. I don't see magic users being a big thing in the DCEU and if they were, Zatanna would be the obvious choice.
That said, if they're cheap, why not take a chance? They'll either stay in your collection or you'll make a few quid. Win/Win if you ask me Oh and still send me a copy
Not agreeing or disagreeing, but I would be curious if your answer would be similar if someone asked you about Rocket Racoon a few years back.