At the Age of Ultron panel, Marvel was showing off a few covers:
Age of Ultron 7
Age of Ultron 7
Age of Ultron 8
Fearless Defenders 4
Uncanny Avengers
Age of Ultron 10 AI
Age of Ultron 9
Age of Ultron 10
Age of Ultron 9
Avengers AI 1
Avengers AI 1