Stroman, Benintendi, and Cruz would be a much better offseason than I'm expecting.
I'll go:
First transaction: Declining options on Encarnacion/Gonzalez, non-tendering Rodon/Mazara etc.
Crazy trade scenario: trade Cease, Madrigal, and Stiever for Syndergaard (rental), Conforto (rental), and Seth Lugo (not expecting this exactly but Cease+ to the Mets wouldn't shock me)
Biggest signing: La Stella
2021 closer: Heuer
Bauer 2021 team: Mets