For my first article, I'll write my spin on what The Avengers 2 could be like.
This idea of mine is far from complete, but I have the basic idea in place.
At the beginning of the film we see "The Other" travel into the future, where he seeks out a man named Nathaniel Richards. "The Other" tells Nathaniel about the threat to his present empire: The Avengers.
"The Other" encourages Richards to use his advanced technology to travel back in time and eliminate the Avengers before they prevent his empire from coming into being. Richards assumes the identity of "Kang", and once he travels back he proceeds to form his own team of super-powered beings. He travels back to the end of "Iron Man 3" and recovers the mutilated body of Aldrich Killian. With the help of "The Other", he revives Killian and makes him his first recruit. Kang creates his own version of Tony Stark's arc reactor, which on one hand keeps the Extremis virus in Killian from causing him to explode, and on the other powers Ten Rings that have different abilities/functions. Kang encourages Killian to actually live up to his claim ("I AM THE MANDARIN!"), and from there they continue recruiting.
They break The Abomination out of "The Vault", and find the surviving villains from Thor: TDW and Captain America: TWS (Malekith or Kurse, Crossbones or Dr. Zola). Kang also persuades two confused, and "gifted", siblings to join his cause as well. Together they proceed to tear The Avengers apart.
Now, I know this is rough, but those are my ideas for now. Considering we're only one film into Phase 2, there's only so much I can go on. Other plot/character elements I had in mind was to have Kang be an Anti-Nick Fury, and have the two siblings (Wanda and Pietro Maximoff) switch sides towards the end, even though their efforts prove futile.
My casting ideas are for everyone who's already established to have the actors who played them come back, and in addition:
Kevin Spacey for Kang:
Alexandra Daddario for Wanda Maximoff/Scarlet Witch:
And Tom Felton for Pietro Maximoff/Quicksilver:
So, anyways, I encourage the readers of this piece to help me expand on this plot idea, as well as tell me what they don't like about it.
Credit for Mandarin, and Scarlet Witch and Quicksilver art goes to DarthDestruktor on deviantart and jbadgr on deviantart. ;)