The more I think about it, the more I think Meteor Black Comet Dragon would probably be acceptable. It's only 1200 burn. (1400 if you want to go really crazy and run REBMD just for the extra burn.)
I'm not expecting it in this Structure, though, since it likely would've been a cover card. We'll probably just get a reprint Meteor Black or Slash.
What would be the cover card, though? I doubt they would give us box reprints as structure deck cover card, especially if they are already box cover cards.
They didn't change how the cards looked for stylistic reasons. It was legal reasons I believe, due to advertising laws. (Guess the cards resembling the RL cards counts as product placement.)
Retro is a Level 4. That would be a box SR at most, not a cover card UR.
I think the structure deck cover card won't be the original Red-Eyes (that would be for a separate campaign, since it's apparently guaranteed Prismatic), but Red-Eyes Alternative instead. It's the only boss monster left that's quite okay in DL, as the rest are too OP due to inflicting high amount of Burn damage, or is REDMD.
I forgot Red-Eyes Alternative even existed. But it's highly unlikely. Barring Normal Monsters and the 2 anime cards, we haven't gotten any cards in Duel Links so far that haven't had a TCG release.
The card that's the "cover card" hardly matters. Ultimate Pound was the AG one, and it sucks. I was just saying Retro's what they could go with if they wanted a monster instead of Fusion.
If they're going to deliberately pick a "hype" card to be the cover card, it's probably going to be Black Stone or Meteor Black Comet Dragon. Retro was just my "if they're using Red-Eyes Fusion itself as the selling point" cover card.
It's likely too, but then what Level 6 Dragon they would include as its material? Just the vanilla Meteor Dragon? Since Red-Eyes Impact already can be obtained in another way.....
Red-Eyes Darkness Dragon is possible too, perhaps even more likely since it would be a third repeat of the "UR deck cover is useless" thing, after BE Solid Dragon and AGG Ultimate Pound.
....I still wish it won't be REDD though, due to how bad it is
They could throw in any Level 6 Dragon honestly. They're yet to include an existing card that wasn't either a Pack card or Polymerization, so it's likely either filler like Tiger Dragon, Luster Dragon #2 or Meteor Dragon, or a new card like Chthonian Emperor Dragon. They only need 1, and there's a lot of options.
Retro is definitely possible, but they would want the cover card to have a bit more Omph even if it ends up sucking like Ultimate Pound or Solid Dragon.
Best case would be Alternative but I do think that's also unlikely. Chances are it'll be Black Comet dragon, it's not too OP and not too bad like Brave Neos.