This cardset has lots of discussion of plans and possibilities. Some of the notable places to look for discussion are:

Story discussion: Community Set: Story / Universe Monocolored Alien Invaders?

Mechanics discussion: Main cardset comments thread. Major mechanic: Monocolour vs multicolour.

• Multicolor: Flying. How can monocolor deal with flying?
• Mono White: Enchantment creatures.
• Mono Blue: Islands and Flood.
• Mono Black: Mechanic: ??? Flavour: Gorgons and Minions.
• Mono Red: Mechanic: Haste? Flavour: Yetis and Devils.
• Mono Green: Fungi.

Structure breakdown, Card lists:

Commons

• Multicolor Commons
• White Commons Submissions
• Blue Commons Submissions
• Black Commons Submissions
• Red Commons Submissions
• Green Common Submissions

Uncommons

• White Uncommons Submissions
• Blue Uncommon Submissions
• Black Uncommon Submissions
• Red uncommon submissions
• Green Uncommon Submissions
• Gold uncommon submissions