The Silver Fern

@Derm-McCrum oops... forgot to ask if anyone else had different predictions...

I think that the final will be between us (New Zealand) and Ireland too. These will probably be the players in each team's match-day 23 permitting fitness.

All Blacks:

1. Karl Tu'inukuafe
2. Codie Taylor
3. Owen Franks
4. Brodie Retallick
5. Sam Whitelock
6. Vaea Fifita
7. Ardie Savea
8. Kieran Read - Captain
9. TJ Perenara
10. Beauden Barrett
11. Rieko Ioane
12. Ma'a Nonu
13. Jack Goodhue
14. Ben Smith
15. Damian McKenzie
    Reserves:
16. Dane Coles
17. Joe Moody
18. Nepo Laulala
19. Scott Barrett
20. Jackson Hemopo
21. Aaron Smith
22. Richie Mo'unga
23. Anton "give me a start" Lienert-Brown

Ireland:

1. Cian Healy
2. Rory Best - Captain
3. Tadgh Furlong
4. Devin Toner
5. James Ryan
6. Peter O'Mahony
7. Sean O'Brien
8. CJ Stander
9. Conor Murray
10. Johnny Sexton
11. Jacob Stockdale
12. Bundee Aki
13. Robbie Henshaw
14. Jordan Larmour
15. Rob Kearney
    Reserves:
16. Niall Scannell
17. Jack McGrath
18. Andrew Porter
19. Iain Henderson
20. Dan Leavy
21. Kieran Marmion
22. Joey Carbery
23. Will Addison

So... the Rugby World Cup is this year... I reckon that the eight teams to make the playoffs will be:
Ireland and Scotland (Pool A)
New Zealand and South Africa (Pool
England and Argentina (Pool C)
Wales and Fiji (Pool D)

Hmm... an All Black squad in 2020... that depends on what spots are vacant. This will probably be the 2019 World Cup squad that Shag picks. He'll probably pick these players for the 2019 World Cup:

Hookers:

1. Codie Taylor
2. Dane Coles
3. Asafo Aumua

Props:
4. Karl Tu'inukuafe
5. Owen Franks
6. Ofa Tu'ungafasi
7. Nepo Laulala
8. Joe Moody

Locks:
9. Sam Whitelock
10. Brodie Retallick
11. Scott Barrett

Loose forwards:
12. Kieran Read - Captain
13. Ardie Savea
14. Vaea Fifita
15. Jackson Hemopo
16. Matt Todd/Sam Cane - IF Cane comes back
17. Luke Whitelock

Scrum-halves:
18. TJ Perenara
19. Aaron "kick away possession" Smith
20. Te Toiroa Tahuriorangi

First-Fives:
21. Beauden "kick away possession" Barrett
22. Richie Mo'unga
23. Damian "kick away possession" McKenzie

Midfield:
24. Ma'a Nonu (Williams and Crotty are past it)
25. Anton Lienert-Brown
26. Jack Goodhue
27. Ngani Laumape

Outside backs:
28. Rieko
29. Ben Smith
30. George Bridge
31. Waisake Naholo

So after the World Cup we'll need to find replacements for Owen Franks, Ben Smith, Kieran Read, Dane Coles, Waisake Naholo, Ma'a Nonu, Aaron Smith, Matt Todd, and possibly Beauden Barrett. If Foster is Head Coach, all of those other players will stay the same.

Here's some possible replacements for those 8 or 9 players:

Folau Fakatava (currently uncapped) WILL replace Aaron Smith, it's just a matter of when

Jordie Barrett, David Havili could be re-called in 2020, or Will Jordan and Solomon Alaimalo could debut as replacements for Ben Smith. Matt Duffie is a bit old for a re-call.

Tyrel Lomax, Reuben O'Neil (uncapped), Mike Alaalatoa (uncapped) and Harry Allan (uncapped) are possible replacements for Owen Franks

Marino Mikaele-Tu'u (uncapped), Devan Flanders and Akira Ioane are probably better replacements for Read in the long-term, rather than sticking with Gareth Evans

I think we all know that even if Nathan Harris is chosen over Ricky Riccitelli (uncapped) and Asafo Aumua for 2019, both of them will be All Blacks by 2020 as replacements for Coles

So many options to replace Naholo, luckily. Uncapped players who could replace him are Salesi Rayasi, Etene Nanai-Seturo, Jordan Trainor, Caleb Clarke, Leicester Faingaanuku (who I think is the next Julian Savea), Tevita Li, even Jonah Lowe could have a crack at taking Naholo's spot.

Potential uncapped new midfielders to replace Nonu include the likes of Vince Aso (hope he isn't selected), Billy Proctor, the Umaga-Jensen brothers, but personally I'd move Rieko to centre and re-call David Havili to blood some new outside backs like Clarke.

Wether Dalton Papali'i makes the next World Cup or not, he's going to be a regular starter by 2023's World Cup. Other loose forwards who could possibly make their debuts after 2019's World Cup are Hugh Renton, Ethan Blackadder, Lachlan Boshier, Mitch Karpik and Blake Gibson. They'll do the job replacing Matt Todd.

If Beauden Barrett does end up leaving, I'd say it's a straight race between Brett Cameron and Bryn Gatland (uncapped) for his jersey. I don't see Stephen Perofeta giving Mo'unga a challenge at the starting role.