Dear Thor.
I am not sure what should I say, as I have no idea if you'll ever have a chance to read this. (I certainly hope you won't – if you are reading this, I am dead.) You scared me to death when you landed on the roof of my jet on the way from Stuttgart. And how was I supposed to trust you – brother of the man who took Clint from me?
It wasn't hard. You are the most honest man I have met. For me, a liar by trade, that was hard to understand. I have been trained to extract truth from people, I am used to tricking them, even beating them up when necessary. That's why I was so surprised when I was confronted with someone who shared the truth willingly.
Stay that way, my brother in arms. Stay true. Stay worthy.
Dear Tony.
If you don't get your metal ass here and save me, I swear, I will come back to haunt you. But how could you? You have no idea I am in trouble.
I must admit I hated you for some time. You were simply an annoying overgrown child who cared only for himself. But when I looked in your eyes in the boxing ring, I saw something beyond that. You were terrified, but you concealed it even from those closest to you. I saw how damaged you are and I felt sorry for you. But then came Manhattan and you were hugging the nuke. Now I respect you. I want you to know that. You are a hero.
Be nice to Pepper, she deserves it for putting up with you. And don't drink too much on my funeral.
Dear Bruce.
I am sorry. I have always kept my distance from you. You remind me too much of my past, of the time when I had no control over myself. I have had nightmares about the Other Guy ever since I first saw the footage from the Culver University. In my mind you were the Other Guy. Now I know better. I don't hate the Other Guy as much as I used to because he's a hell of an ally.
And I can't hate you. You are my friend. I hope you know that.
You are not the fifth wheel, you are an essential member of the team. After all, you are the reason why we are still stuck with His Annoyance Tony Stark. I still blame you for saving him.
If you get your chance, go and find your Betty. Don't waste one moment with her. Life is too short for tiptoeing.
Dear Steve.
You have always been everything I haven't. You are pure, you are in for the cause, not because you are a damaged human being like me. You are like somebody from a fairytale, too heroic to be real.
From the moment I saw you on board of the Helicarrier, I have admired you. I'm not really used to taking orders and I don't like it much, but I followed you it the battle willingly. Maybe you can't control lightning or you don't have a perfect suit of armor, but you are so much more. You are the heart of the team and without you there would be no Avengers.
Just keep doing what you're doing. They need you. Look after them.
Keep them together, keep them fighting.
Dear Clint.
There is so little left to say.
You were the one that made me human.
It was not your fault.
There was nothing you could do.
Goodbye, my love.
Live on.