The first known white ball python was wild caught so, yeah it could survive.
The "morphs" in BP's so far are pretty much all selective expression in greater quantity than normal of existing wild gene mutations.
Also, breeding for preservation is a non-issue so long as accurate breeding records are kept. Then even hybrids are not a "problem" as those snakes would automatically be excluded from breeding programs aimed at re-introduction should some catastrophe suddenly kill off most wild BP's.