Not sure if this topic has been covered or not, or if it's even viable. I just got this idea from Ben Blieweiss's article about the financial value of Alara Reborn. I don't have an exact decklist, but rather a shell that's been bouncing around my head for the last few hours.

4 Ardent Plea
4 Demonic Dread
4 Violent Outburst

4 Hypergenesis

4 Progenitus
4 Angel of Despair
3 Empyrial Archangel
3 Sundering Titan
3 Hellkite Overlord
3 Akroma, Angel of Wrath

4 Simian Spirit Guide
4 Elvish Spirit Guide

16 lands

Obviously this looks like trash, but the basic gist is turn 2-3 3cc Cascade spell for Hypergenesis, and just unload the most ridiculous monsters ever printed. This isn't the only way it could be run, since Hypergenesis can put lands, artifacts, and enchantments into play as well. This makes it so that many other "combo" options are available as well besides the dump the nastiest finishers ever into play. Obviously the way it currently is makes it pretty cold to Counterbalance with a land on top, but the deck seems pretty sick against most other strategies. The amount of customization that is within this shell is insane. You could have more blue fat creatures and be able to run Force of Will, since Ardent Plea can also be RFG to pay the cost. The fact that they you can run 12 3cc Cascade spells really helps give this deck a sense of redundancy. Anyways, its just an idea, but definitely seems like something worth looking into.