Here's my idea on where cards are going to go in terms of prices for the new set. I'll give you the current Star City Games price and the price I think it change to after the initial hype dies down.
Birthing Pod R - SCG $4 > $2 - I think the price on this card will fall as it won't be a major player in any deck right away but it could eventually see the price of $5 when it does find a home.
Blade Splicer R - SCG $2 = $2 - This is a fair price right now and seeing how he is in a pre-constructed deck his price won't go over $5.(see Student of Warfare)
Bludgeon Brawl R - SCG $1 > .10 - Bulk
Caged Sun R - SCG $4 > $2 - EDH Playable so the foils will demand more attention than the regulars.
Chancellor of the Annex R - SCG $1 > .10 - Bulk
Chancellor of the Dross R - SCG $2 > .10 - I don't know why this one is $2!?
Chancellor of the Forge R- SCG $1 > .10 - Bulk
Chancellor of the Spires R- SCG $1 = $1 - This is one of the more EDH-able Chancellors.
Chancellor of the Tangle R- SCG $1 = $1 - This one might even see constructed play thanks to Fauna Shaman.
Fresh Meat R - SCG $1 = $1 - I like this card but I don't think it's going to make a big splash.
Glistening Oil R - SCG $1 > .10 - Bulk
Hex Parasite R - SCG $6 > $5 - I can see this card holding its price with planeswalkers being as powerful as they are.
Invader Parasite R - SCG $1 = $1 - This is an okay sideboard card against valakut decks.
Jor Kadeen, the Prevailer R - SCG $1.50 > .10 - This card really doesn't have a home.
Lashwrithe R - SCG $4 > $1 - Phyrexian Obliterator seems like a better 4 drop if I'm going to be playing this many swamps.
Life's Finale R - SCG $2 > $1 - MBC has been trying for a long time on a good note this is a nice EDH card so foils of these will be worth a little more.
Melira, Sylvok Outcast R - SCG $2 = $2 - I think this card will be good against the rising mono-green infect deck. I expect it's price to hold.
Moltensteel Dragon R - SCG $1.50 > $1 - He looks like he can be really good but hes also very vulnerable.
Myr Superion R - SCG $4 > $3 - This card might make it into a deck but I don't think it'll break into the scene.
Norn's Annex R - SCG $2 > $1 - I don't think this card will work like people want it to.
Omen Machine R - SCG $1 > .10 - Bulk
Phyrexian Ingester R - SCG $1 > .10 - Bulk
Phyrexian Metamorph R - SCG $4 > $3 - I think this card will drop a little but it will see play somewhere especially in older formats theres already a combo forming with it.
Phyrexian Swarmlord R - SCG $1 > .10 - Bulk
Phyrexian Unlife R - SCG $1.25 > $1 - This card needs to find a home before the price jumps and there isn't one for it right now.
Praetor's Grasp R - SCG $4 > $1 - I don't see the hype behind this card right now. I guess I get to steal their equiment but I'm still wasting two turns not really doing anything.
Psychic Surgery R - SCG $1 > .10 - Bulk
Puresteel Paladin R - SCG $6 > $5 - I think this card won't go down much if that! It could really break onto the scene if the right deck uses it oh say Quest?
Slag Fiend R - SCG $4 > $1 - No home right now but it could be a powerhouse watch this one.
Soul Conduit R - SCG $1 > .10 - Maybe in EDH(foil) just for fun?
Spellskite R - SCG $5 = $5 - This card might hold as a solution to Splinter Combo.
Surgical Extraction R - SCG $12.50 > $5 - Extirpate was decent in it's day but it still doesn't effect what a deck is trying to do people will just find other ways to kill you.
Torpor Orb R - SCG $4 > $1 - This is a sideboard card and another solution to Splinter Combo.
Unwinding Clock R - SCG $2 > .10 - Bulk
Xenograft R - SCG $1 = $1 - Theres an ally combo with this card so the price might hold.
Batterskull M - SCG $25 > $20 - This is as good as they've been saying but I think the demand will settle the price just a little lower than they are asking for right now.
Elesh Norn, Grand Cenobite M - SCG $6 > $3 - This card can hinder a lot of strategies but I don't see it going into any decks right after launch.
Etched Monstrosity M - SCG $3 = $3 - This will hold at bulk mythic price.
Jin-Gitaxias, Core Augur M - SCG $5 > $3 - Costing 10 doesn't help this card but if it does sneak into play and live for a full turn it should let you win. Watch this card.
Karn Liberated M - SCG $50 > $35 > $20 - I think this card will keep dropping in price the longer it takes to find a use.
Phyrexian Obliterator M - SCG $25 > $20 > $10 - The price on this is already too much if MBC actually works it may hold the price of $20 if it fails it'll drop to $10 maybe below.
Sheoldred, Whispering One M - SCG $5 = $5 - This card is good and might even replace Grave Titan.
Sword of War and Peace M - SCG $30 > $25 - This will hold the price of the other swords and maybe even go up! The protection abilities are the most interesting part on this card but the triggers are powerful too.
Urabrask the Hidden M - SCG $8 > $5 - The abilities are attractive but would be better if it was cheaper(with a matching P/T).
Vorinclex, Voice of Hunger M - SCG $4 > $3 - Bulk Mythic
I don't think the card will hold it's price as SCG has it set once the hype wears off. I think Sword of War and Peace will be the chase mythic of the set. Make sure to keep an eye on the big EDH cards(foil) you're sure to find someone who will want them. Good luck!