2. If Spider-Man does appear in Cap 3, Sony wants him back afterwards.
Apparently, the Spider-Man in Captain America: Civil War option is still very much on the table at the moment, but if it happens, Sony still wants the ability to make more movies with the character afterwards.
An October email from Michael De Luca, co-president of production for Columbia Pictures, to Amy Pascal, co-chairman of Sony Pictures Entertainment stated that a Spider-Man that debuted in Cap 3 could go on to star in his own movie:
“I really feel, in my heart of hearts, that the new spiderman [sic] in cap 3 could just appear in his own film, be it sinister six or a kick ass spidey film of his own, after that intro in cap 3 and people would be cool with it,” he wrote.