It must have been quite something, given that Mark even wrote a song about the incident (Let's See You)
No way of knowing for sure what this song is about but given the timelines it's unlikely it was about this incident.
Ed and MK parted ways while planning promo for STP (as per the podcast). So probably Summer 2000?
Let's See You was on the CD single of What It Is, released September 2000. So seems unlikely that MK would have got the 96ers together and rushed out a diss-track like Biggie or Tupac.
I see your point, but I'm not convinced the timeline speaks against the theory that
Let's See You is about Ed Bicknell. They may have parted ways only in September 2000, and but the incident -- or some other, previous incident -- may have happened quite some time before that. Also, the song's intro ("Tonight we pushed the border ...") speaks against Mark writing about some random musician. Like
Terminal of Tribute to, this song is personal. And there are only so many people who qualify as its subject.