Would highly doubt those two would head back in. They have been at milawa for a long time now. And with out knowing who Glenrowan keep for next year would think they would be there abouts for next year.
From what Newton was saying they are all (Newton, Douthie, Porter, Braden, Stamp and Ussher) very keen to play together for the first time since high school, and with the first four all confirmed the temptation for Stamp and Ussher to come across would have to be pretty big.