Yeah, DeLuca wanted to give another shot and make MoS 2 and JL2 with Cavill, but both projects never went past the pitching stage. Can't say if it was more short-lived Cavill's return or DeLuca's leadership.
I don't think he had filmed something for the beginning of the movie, there was always only that scene of Superman being busy in Guatemala with a volcano (it was made long before his return). I started mentioning it around a year ago after the early test screenings of The Flash:
From what I know Henry filmed 2 scenes: in one, while Barry is racing back in time, he appears as Superman in the speedforce covered by particles and Barry says something like ah, here's where you have been the whole time. And the scene at the end as Clark Kent appearing with Gal's Diana to congrats with Barry.
Oh right, I forgot the time reversal for some reason.
And damn, DC had always problems with alternate endings and cuts of their movies lol.
Singer was too reverential of Donner's SM to be able to tell a his own story like he did with the X-Men franchise. I wonder if he ever got exposed to other Superman material outside of those old films. The rumored plot for Singer's Superman sequel sounded insane like wtf? is that supposed to be a course correction?
https://superman.fandom.com/wiki/Sup...e_Man_of_Steel