Check in-store and online
Creature removal for green and blue, enchantment removal for black and red, hand disruption for the non-black decks etc
Serialized-exclusives, like the Praetor artwork, have been far more successful in drawing attention to these singles than simply cutting print runs, so Im doubtful that more of the same just with smaller numbers in the art box will make a massive wave in the sets to come
Legality depends on the tournament format -- Chromatic Lantern can be legal in some formats and banned or restricted in others
I hope Ive helped you understand Commander a little better, and helped you decide what to build or play with
In some situations, the choice will be obvious and you can set up a delayed Duneblast