It not clear.is the wording of that sentence that is odd... "We’ve decided to move the game’s release from November 2020 to February 2021, where it will be included for two months in PlayStation Plus at no additional cost." they could have said that you have two months to add the game to your library... the way they said it looks like the game after this two months won't free anymore... like if they give us a two month free trial for the game to PS+ users, and after it you have to buy it.
It can be interpreted in two ways:
1. It'll be available to download on PS+ for two months, in which as long as you are a PS+ subber the game is there for a while afterwards
2. it'll be available to download on PS+ for two months, but at the end of the two months, it'll be cut off and if you want to keep playing, you buy it for $70
I'm thinking it's #2 because no PS+, PS Now or GWG, Game Pass games are on the rotation for only 2 months.