http://forums.sjgames.com/showthread.php?p=223057
That's the closest thing to an official statement on these forums that I am aware of, regarding the rules as written. In it, Kromm argues against
re-ordering the sequence (although that doesn't mean anything as regards to deciding on a different sequence at the very beginning of the combat).
Personally, I allow players to re-order themselves in the turn sequence, but this requires skipping one turn (Do Nothing).
For example:
Knight 7
Wizard 6
Grog the Mighty Orc 5
Turn 1: Knight attacks Grog; Wizard spins Grog to face the other way; Grog turns back around.
Turn 2: Knight does nothing (move to 5.5 in turn sequence); Wizard spins Grog to face the other way; Grog turns back around.
Turn 3: Wizard spins Grog to face the other way; Knight hits Grog from behind; Grog howls, then turns back around.