Easy, he has no interesting points. Maybe he could guest star in a Spider-Man or DD movie, but it's pretty obvious he's spent for now for another solo shot.
Perhaps ten YEARS down the road. Right now I would advise you, and any others, against holding your breath waiting for a Frank Castle ten minute short.
I have no problem. You on the other hand are seemingly being unrealistic. Do you think Venom should be in the next Spider-Man movie?
Do you honestly think Marvel would waste time on The Punisher, or the chartacter deserves one, with their whole stable of un-taped characters? If so, you should seek help ...
... with that problem Dude.