The writer of The Thunderbolts, Jeff Parker will introduce "Fear Itself" onto his team of villains in Thunderbolts#159 this June,but he also had this to say:
“[Fear Itself] has a massive impact for Cain Marko.In the next few issues, things start coming together in a way that puts Juggernaut in position for this. I expect a lot of readers to be opinionated [about this development]. Everybody seems to have their own goals for the unstoppable one.”
As Parker has said the last year of development for Cain has been preparation for his breakout in the Marvel Universe and a major moment of character definition for the man who has been both hero and villain.
“The theme of fear and how it affects our choices is one we stay on [in THUNDERBOLTS].Juggernaut has gradually started acting like he’s really part of the team, and while that’s been a positive progression, it’s when you start to care more that you start to worry about what you can lose.
When you see what happens in FEAR ITSELF #2, you’ll see how majorly it affects the Thunderbolts and how they won’t be returning to ‘normal,’ whatever that is.[They will be facing] some really divisive non-stop missions. And oh—The Juggernaut!”

The cover and all the other Fear itself news is starting to really intrigue me.It looks as if it could be one of Marvel's best crossover events in a while,but after this I hope it is their last for a while.