I think the team that will line up for the first year will be
1.McGrath 2.Best 3.Furlong
4.AWJ 5.Kruis
6.Stander 7.Warburton 8.TF
9.Murray 10.Sexton
11.North 12.Henshaw 13.Payne
14.Williams 15.Hqlfpenny
16.Owens 17.Vunipola 18.Cole 19.Itoje 20.Vunipola 21.Webb 22.Farrell 23.Hogg
I think Farrell is going as a 10. And i think he's there to push Sexton along with Biggar, i cant see Gatland wanting to break up Sexton and Henshaw. They both destroyed NZ when they played them.
In the pack, the Irish front row must be selected, they are the best unit and Bests experience will count for so much with this team.
I'm going for Kruis and AWJ based on what Wales have. Now i know they don't have the anywhere near the level of locks England do but i think Gatland will want 2 big heavy guys in the scrum. Itoje and Henderson will fight it out for the bench.
Backrow, obviously Warburton as he's the captain and he's the best option. I think he's going to be player of the tour. Stander and Faletau are both complimentary. Best will need all these options lineout.
Half backs, not much to say.
Centres. Here's my big prediction, Payne will play himself into the 15. I don't know if it's at 13/15 but he will do it, and i think with Henshaw you will have a ready made combination able to beat the All Blacks IMO.
Back three, again is a unit. Halfpenny may not be the attacker Hogg is, but he can defend better and has better core skills. Also isn't going to be his first big match. Williams is a player who deserves to be on the pitch, North can't not be taken, and i think he'll start the first test.
That's what i think will happen, probably not nearly right.