Marik Ishtar is a character that's suspected to be coming soon. There are several files found in the game showing a character selection icon, and a player profile icon. Similar to Yugi Muto, he has an alter ego called Yami Marik. His Yami version is more likely to be an unlockable character to avoid having 2 of the same character. Marik Ishtar might make an appearance through a mini event just like the Yugi Muto event.
Based on the anime, Marik Ishtar takes control of other people and use their decks to duel and does not duel himself, unless he is in his Yami Marik form. If he were to appear, he could be bringing other gravekeeper monsters like Gravekeeper's Descendant, similar to Ishizu and Odion's duel rewards.
...Except unavailable skills aren't actually "assigned" to any characters. Those "Marik" skills were just assumed to be for Marik. Could just as easily have been Yami Marik or some other character. (Or no one, since not all skills in the data ever get used.)
Sounds about right. Another problem would probably be the fact that they are now determined to not give characters decent level up and drop rewards anymore. And this is pretty much true for events as well. Any gravekeeper card would be considered as too "good" or fun. The same thing could be happening with Atticus if the red eyes structure deck is anything. Now they don't know what to give them.
True. We would need some kind of theme besides "such and such comes back" for an event. But what about stuff like bingo missions? I really wish they hadn't just turned that into tour guide from the underworld only now. Or was this the real purpose for it I wonder?
Nah. Dian, offerings, and sangan were all originally from selection boxes and they were used quite frequently even before they were officially released. Doubt necrovally would be widely used, maybe only as a 1 card tech option