he's one of the best characters created by Kazuki takahashi
So I think we really need him to be added soon
I'm not saying this for his fangirls
Konami must add him because he was the main villain of season 2 and he had an important role in the story
Dartz is impossible.
Not enough theme and not enough cards. Remember that you not only need enough cards for his drops and level up rewards, but also, you need him to have a lv20/30/40 deck that works. Can't do any of that when he only has 3 cards printed that doesn't work with each other, and he doesn't really have any other theme besides "Orichalchos", which also lacks enough cards.