A port would have to be undertaken. The 6502 is already a known target for the system; the VERA screen driver and network card driver would have to be written.
For a while, Contiki was the retrocomputing equivalent of DOOM: See what you can get it to run on. But then Dunkels took it to the 'professional' microcontroller market and removed most of the 'fun' porting projects from the main web pages for the system and so retro hobbyists stopped finding it as interesting.