I'm in the middle on this one but from a company's pov, don't expect much of this.
They just want to you to buy both games. And if you add building pieces from PC to PZ, the players from PC want the building pieces from PZ.
I think a lot of players would complain about recycling the PC building pieces. (Comments like "I'm not going to pay for that".)
I'm just not thinking that a company should add stuff from another game, just because it has similar game mechanics.