  A homotopy 4-ball is a smooth 4-manifold with boundary $S^3$ that is
homotopy-equivalent to the standard $B^4$. The smooth 4-dimensional Schoenflies
problem asks whether every homotopy 4-ball in $S^4$ (or equivalently
$\mathbb{C}^2$) is standard. It is well-known that if a homotopy 4-ball embeds
as a compact, pseudoconvex domain in a Stein surface, then it must be standard.
In this paper, we describe a compelling reimbedding construction for homotopy
4-balls in $\mathbb{C}^2$. In particular, given a homotopy 4-ball in
$\mathbb{C}^2$, we construct a diffeomorphic domain that is the union of three
pseudoconvex domains. Moreover, we give an analytic criterion that ensures this
domain is a standard 4-ball.
