Breaking down the possibilities presented by Marvel's classic android
Like Father, NOT like Son
As longtime Marvel readers know, the Vision was originally built by Ultron to destroy the Avengers. In his first appearance, the mysterious, red-faced humanoid infiltrated Avenger's mansion and took down Earth's Mightiest Heroes. Imagine this sequence playing out on the big screen, with the Vision systemically dismantling Thor, Hulk, Iron Man, Captain America and the rest in his very first appearance. Theater audiences wouldn't know what hit them as the Vision uses his density and phasing powers to take down Marvel's greatest heroes at the command of his evil father.
After establishing the Vision as the ultimate badass, Whedon could shift gears over the remaining the drama and pathos as the Vision learns to be human, discerns the meaning of love and compassion and eventually turns on Ultron. The Vision's turn to humanity was one of Roy Thomas's finest moments as writer of "The Avengers," and to see this saga played out, to see the Vision find his heart and betray his evil mechanical menace that gave him life, and cry that legendary tear that originally fell from his synthetic eye in "Avengers " #58, could be a classic Marvel movie moment. Whedon's Avengers are very human characters, imperfect and inspirational, and seeing Vision learn about the best of humanity through Cap, Banner and Stark would be a fitting and moving tribute to one of the Silver Age's finest moments.