Andrew Garfield, Tobey Maguire, and Alfred Molina are all coming back with new Spider-Man 3, confirmed by Collider.
Alfred Molina’s return as Otto Octavius -Doctor Octopus- was announced by The Hollywood reporter in news. Then Collider added on with “Kirsten Dunst will return as MJ” and “Andrew Garfield will be back.”, they also stated that Maguire could also be coming if Sony and Marvel can cut a deal.
Maguire acted as Peter Parker, and Spider-Man, in Spider-Man(2002), Spider-Man 2(2004), Spider-Man 3(2007). Garfield on the other hand acted as the same characters in The Amazing Spider-Man(2012) and in The Amazing Spider-Man 2(2014). For Dunst, she played in the first 3 Spider-Man movies as MJ.