Ravnica Remastered will feature cards from all three blocks and will play into everything that makes Ravnica Ravnica, especially the guilds, Magics Head Designer Mark Rosewater said
If your Leader has multiple colors, then you can use cards of each color in your deck
Just remember that you cant transform Treasure Map and then attack with the Treasure tokens that turn
Preventing a player from blocking is about as close as red gets to a proper Overrun
Absol D - Whirling Calamity Deal 10 damage to all of your opponents Pokemon (Don't apply Weakness and Resistance for Bench Pokemon.) DC - Claw Gouge 50+ If there are any damage counters on your opponent's Pokemon, this attack deals 70 more damage
All this means is that Deathrite Shaman will still see play, but as long as WotC is careful not to allow too much in the way of fetchland-style designs in to the format, it wont be the format-warping, colour pie-breaking menace that we remember