Benedict Cumberbatch would portray Stephen Strange in the Spider-Man 3. Tom Holland, who would be playing as the famous web-slinger, would be acting opposite to Doctor Stranger. Neither Sony and nor Marvel had any objections against this. Robert Downey Jr.’s Iron Man gave his input to act as a mentor for young Peter Parker for Spider-Man: Homecoming. Later on, Nick Fury also came in for Spider-Man: Far From Home.
THR made a report about Jamie Foxx stating that reprising the Electro Character from the Amazing Spider-Man 2. Along with that, they would also reprise the character from Amazing Spider-Man 2, both for Marvel as well as Sony. However, the returning of J.K. Simons as J. Jonah Jameson especially in the end-credits did make many opportunities.
What would happen due to Doctor Strange’s involvement in the film?
Doctor Strange’s introduction in the film might create a new amount of reality-warping. Strange and Spider-man first met during one of the events of Avenger: Infinity War. Since then the discussions on taking Doctor Strange for Spider-Man 3 have been going on. After that, decisions regarding bringing Doctor Strange opposite to Spider-Man confirmed.