There were 3 different Spidermen: Tobey Maguire, Andrew Garfield and Tom Holland. They all came together in No Way Home.
There are 3 different Batmen (recently): Christian Bale, Ben Affleck and Robert Pattinson.
Do you think they are trying to bring them all together in a film against previously fought villains? Scarecrow, Joker, Two-face, Bane, Ra's Al-Ghul, Harley Quinn, and the Riddler?