September 2, 2017 Update: And after a bunch of silly Reserved List buyouts-even though I don't care one way or the other about the Reserved List since I am almost exclusively an online player-it would be sweet justice if the Reserved List was, after all the lawyer fear-mongering, abolished. Yeah, if Iconic Masters has the Power 9, that will definitely make the $10 packs a bargain. If not... I just can't see what Wizards could possibly print in these packs... I really can't.
Here is a reddit topic for Iconic Masters:
https://www.reddit.com/r/magicTCG/comments/6xp1pv/what_could_possibly_be_included_in_iconic_masters/
Armageddon
Medium value, needs a black border reprint.
Bad Moon
Commander junk rare.
Balance
Candidate for a mythic slot.
Berserk
Conspiracy Mythic.
Birds of Paradise
Eternal solid rare.
City of Brass
Eternal solid rare.
Counterspell
Will make a great common.
Crusade
Rare in a duel deck.
Demonic Tutor
Reprinted in Divine vs Demonic. Mythic rare candidate.
Diamond Valley
A rare reprint that would be a nice rare pull.
Disrupting Scepter
From old core sets, would be a junk rare.
Earthquake
From old core sets and several commander products, would be a junk rare.
Elvish Archers
From old core sets, would be a nice uncommon.
Goblin King
Crowd favorite, another junk rare.
Howling Mine
Crowd favorite, another junk rare.
Jayemdae Tome
Was an uncommon as recently as Origins.
Lightning Bolt
Classic, and should be a common.
Lord of Atlantis
Crowd favorite, another junk rare.
Mana Drain
Another candidate for a Mythic slot, similar to Balance.
Mana Vault
From old core sets, and will make a solid chase rare.
Mind Twist
From old core sets, would be a junk rare.
Nevinyrral's Disk
Commander junk rare.
Nightmare
Would be the junkiest of junk rares, and just for that reason a poor inclusion.
Royal Assassin
From old core sets, would be a junk rare.
Savannah Lions
Would be a cool uncommon.
Serendib Efreet
Already a junk rare in Eternal Masters.
Shivan Dragon
Would be the junkiest of junk rares, and just for that reason a poor inclusion.
Sol Ring
Has been reprinted in every commander product. An iconic uncommon, however cheap.
Stasis
From old core sets, would be a reasonable rare.
Swords to Plowshares
Has been reprinted enough. An iconic uncommon, however cheap.
Verduran Enchantress
From old core sets, would be a junk rare.
Winter Orb
Already a junk rare in Eternal Masters.
Wrath of God
From old core sets, would be a reasonable rare.
Animate Dead
Was an uncommon in Eternal Masters.
Ankh of Mishra
From old core sets, would be a junk rare.
Black Vise
From old core sets, would be a reasonable rare.
Blood Moon
Still a valuable rare from Modern Masters.
Concordant Crossroads
I am surprised this card has not been reprinted even though it is not on the reserved list. Would be a chase rare or a Mythic.
Erhnam Djinn
Would be a fun uncommon.
Force of Nature
From old core sets, would be a junk rare.
Hypnotic Specter
From old core sets, would be a reasonable rare.
Icy Manipulator
Would be a fun uncommon.
Island Sanctuary
From old core sets, would be a reasonable rare.
Karakas
Eternal Masters Mythic rare.
Lord of the Pit
From old core sets, would be a reasonable rare.
Mahamoti Djinn
Would be the junkiest of junk rares, and just for that reason a poor inclusion.
Mana Flare
From old core sets, would be a reasonable rare.
Meekstone
From old core sets, would be a reasonable rare.
Nether Shadow
From old core sets, would be a reasonable rare.
Psionic Blast
Timeshifted, would be a reasonable rare or a chase uncommon.
Serra Angel
An iconic uncommon is an iconic uncommon.
The Hive
From old core sets, would be a reasonable rare.
Will-o'-the-Wisp
From old core sets, would be a reasonable rare.
Zombie Master
From old core sets, would be a reasonable rare.