j.623b can be followed by 5b aircombo, or, this one is conjecture on my part, maybe even 5b 2b aircombo. The standard aircombo is something like j.b j.4c dj.4c dj.c, with an optional j.236a for poison.
If you want to go for the super, 5b 623b may combo, I don't really know about the combo length the ground throw allows (comboing after a normal throw is quite a foreign concept to Bang players). But then, maybe you'd have been better doing a nail cancel d.5c 6a 623b, if you wanted to super that much. At least in CT, that was usually the most damaging way of going about it.