What's next?!

Now that we have caught up to the paper magic blocks it makes me ponder what's next. Maybe it's a long shot but I'd love to see them bring in some "legacy" cards, like they did walkers. Classics like lightningbolt, serra angle, shivan dragon, counterspell, dark ritual, and many many more. Obviously they'd have to adapt them to puzzle quest, but heck something like lightningbolt you could almost do exactly, 1 mana for 3 damage, wouldnt be too op, and give us some nostalgia to boot.