When I collected my season ticket in the shop I was told that all five pictured are signed up for next season.
This doesn't mean that they will all be here next season.
Apparently, this was the second or third version of the header for the letter.
That's all the information I was given.
I quote from the "Important Notice" on the invitation to invest in the bond:
"The Exeter Chiefs 2020 Bond will be issued by Exeter Rugby Group Limited (which has resolved to change its name to Exeter Rugby Group PLC and re-register as public limited company), with its registered office at Sandy...