Yes, you can use some previous pens from your previous generation Wacom products listed below. You cannot use the Pro Pen 2, which is included with your Wacom Intuos Pro tablet on previous generation products.
Pro Pen (KP503E): A highly ergonomic designed pen providing all popular Wacom pen features. Using this pen on the new Wacom Intuos Pro will provide 2048 pressure levels, not 8192.
Art Pen(KP701E2): Our most popular accessory pen provides rotation and the feel of flat brushes, markers, calligraphy pens, and other natural media tools. Use it with either a round or chisel point nib. Application software support required. Using this pen on the new Wacom Intuos Pro will provide 2048 pressure levels, not 8192.
Classic Pen(KP300E2): Designed for those who prefer a thinner pen, it is an alternative to the standard Grip Pen. Using this pen on the new Wacom Intuos Pro will provide 2048 pressure levels, not 8192
Airbrush (KP400E2): Designed for those who prefer an airbrush effect. Using this pen on the new Wacom Intuos Pro will provide 2048 pressure levels, not 8192.
Grip Pen (KP501E2): A highly ergonomic designed pen providing all popular Wacom pen features. Using this pen on the new Wacom Intuos Pro will provide 2048 pressure levels, not 8192. You cannot use the Pro Pen 2, which is included with your Wacom Intuos Pro tablet on previous generation products.