Auva'a confirmed on Twitter (in response to someone else asking him, the merkin ignored when I asked him) that he was here in 2018:
2017
Utility: Folau (23), Gutherson, Nelson (29), Smith, Takairangi
Fullback: French
W/C: Auva'a, Davis, Hoffman, G.Jennings (24), M.Jennings, Radradra (25), Schulte (22), Tuha (24)
Half: Dargan (20), Moses, Norman, Robson (35)
Hooker: De Gois**, King (26), K. Pritchard
Edge forward: Edwards, Gower (32), Ma'u, Moeroa, Morris, Niukore (21), F. Pritchard (34), Scott, Woods (22)
Tight forward: Alvaro, Brown, Mannah, Matagi, Meehan* (22), O'Brien (28), Terepo (26), Ualesi (24), Vave
2018
Utility: Gutherson, Smith (26), Takairangi
Fullback: French
W/C: Auva'a (26), Davis (23), Hoffman, M.Jennings
Half: Moses, Norman
Hooker: De Gois (34)**, K. Pritchard (24)
Edge forward: Edwards, Ma'u, Moeroa, Morris (22), Scott (34)
Tight forward: Alvaro (25), Brown (25), Evans, Mannah, Matagi (30), Vave (29)
2019
Utility: Gutherson (25), Takairangi (30)
Fullback: French (23)
W/C: Hoffman (31), M.Jennings (31)
Half: Moses (25), Norman (28)
Hooker: -
Edge forward: Edwards (30), Ma'u (31), Moeroa (24)
Tight forward: Evans, Mannah (31)
2020
Utility: -
Fullback: -
W/C: -
Half: -
Hooker: -
Edge forward: -
Tight forward: Evans (28)
*Can't even f**ken play!
**Rumoured ineligible for selection due to health issues
So we officially have at least 23 merkins in next year's squad.