The story is very good. Really very good. The protagonist is well developed and his progress, although slow, is just right.
He still has 4 years before the events of 'Avengers 1' and he won't even participate, since he kind of can't.
The only thing I have to complain about, for lack of a better word, is that some chapters are very short and some events that could be summarized in 1 or two chapters last longer. The time jumps are short. From time to time, you can skip 3 months and then say what was done in that time. I won't complain.
So, the story is perfect. Hope you don't mess up, huh?
There is. One suggestion from me is that he starts going after HYDRA bases or after the worst human beings in the world. Drug dealers, murderers, dictators and others.
And for the costume, although I love Akatsuki's outfit, I would like to see him dressed as Red Hood with the red cloud symbol on the back. That's my assessment. To be continued. Please.