depends on how many plants ya use in the cross, less plants less phenotypes you would see in a generation compared to usin a crap load of plants.
but as Tex says, you could see quite a few also dependin on how ya break um down, as really each plant is a individual.
what ya describe is a 4 way hybrid, and phenotypes would also depend on how much those lines were worked, your F1 hybrid population prolly will look decent, the second gen you will see what your cross has to offer as far as phenotypes.
then there may bee plants pop up further down the road that you havent seen previously.
so to wrap that all up, your creatin a mutt:D
CBF