If you set Three Houses = Red Dead Redemption 2015 and assume that Xenoblade didn't SFF it, 2020 Xenoblade gets about 61% on 2015 Xenoblade.
Assuming a constant MGS5, 2020 Dark Souls gets about 59% on 2015 Dark Souls.
If you account for the rally and assume Bloodborne gets about 55% on Awakening this year, then 2020 Bloodborne gets about 58.5% on 2015 Bloodborne.
The Last of Us, despite poor Round 1/2 showings, did slightly better against Arkham City than 2015 projections, implying it hasn't dropped in strength.