This won't be too different from the first one, but I'm going to add more details this time. Basically, have Bleach and Marvel already be set in the same multiverse/universe, rather than having Ichigo be transported to the multiverse of Marvel. After the Thousand Year Blood War has ended, Ichigo continues taking hollows out every now and then with his friends in Karakura, every now and then going to check up on the residents of soul society. Largely, he lives a life free of any conflicts or problems, alongside Orihime and Kazui. Then, however, Shield tracks him down, and he gets propositioned to help out with Loki; he eventually becomes an Avenger. I want Ichigo to have all-powers in this, and I also want for you to not make him female, like so many of these crossovers do. Make him train his Quincy abilities on his adventures with the Avengers, and if you would like maybe include some DC, too, though I don't really see how that would work without the two series messing each other up.