Are you OK with Jones getting an immediate rematch if he loses?

[Shaddows]

No.
I am not ok with ANY rematch unless there's a specific reason for that.
If there's a contradiction (i.e. Machida & Rua I), then they should (rematch).

but not just because Jon is the champ.

Sorry, but being a champion does not mean you get a rematch.

 

[Zeroinnes]

If it's a good fight then I don't care.

If he gets bitch tossed left and right and looks terrible then it would make no sense. UFC gonna UFC, though.