I have a sneaky yet unfounded, foundationless belief that Jarrad McVeigh might be on the outer.
1) He has been removed as co-captain (including Jack), so he cannot just walk into the team like he did in the eve of the 2016 grand final.
2) Longmire having seen that a zippy, lightning quick half back can win (or have significant influence breaking defensive lines) a grand final and Norm Smith medal in JJ, might experiment with a few younger players at that role.
3) The age old question of age and being on the wrong side of 30. We have seen countless players over 30 excelling in their position and in the "modern game", however, from my observation of McVeigh, he was the player that Longmire wanted to be that fast and zippy player to break lines. There is no question that McVeigh has exceptional footy smarts and calming influence over games from defense, however, footy game styles adapt ever few seasons. Right now, the handball-happy Bulldogs have shown that you cannot outrun a football in close quarters with this free-playing and unselfish style. Included in this new game style is the attacking half back. Nothing new to the style of player but the importance of having an A grade one has and look at what has changed since the end of the 2016 season - JJ won a Norm Smith, Andrew McGrath (an all-rounder player but predominately an attacking half back) was selected number 1 by Essendon over the best "complete" midfielder in the game (arguably McCluggage given he is a goal kicking midfielder). McVeigh might still have a spot in the Swans best 22 but if Newman is an attacking half back from what I have heard, he is likely to see some game time.
On Nic Newman that I have just found. Won the BOG medal in a losing Swans NEAFL Grand Final side. Has yet to debut after 2 seasons on the list but was given a new two-year contract at the end of the 2016 season (this is without any demonstration that he can play against the bigger AFL bodies). He is a mature aged player given he is 24 this year, which only helps his case for playing this season.
http://www.sydneyswans.com.au/news/2016-09-13/new-deal-for-newy