The Idea for the playstation remote play, may or may not work. But as for converting the code just to work of the bat. I am sorry but that is not possible, the playstation remote play uses an whole different protocol and philosophy as the Wii U screen signals do,
Wii U - Bluetooth
Remote Play - Internet.
In this sense it will actually be easier to emulate an Playstation Remote Play device than an Wii Device, but with the Wii U, the verification can be easy let tedious to crack, the Playstation is on an whole different level, To crack the playstations remote play you will need to intervene the signals between the two, where as the Wii U. Just dump and decompile the firmware, then try to understand it. Wherea as the Playstation will not be as simple.
I hope this helps.