There will be the 4th and 5th part of the Spiderman movies.But lets take a look at the 4th one.
There already many videos on the web about the filmings.
The next enemy of spiderman is probably "the Lizard" but the studio is thinking about the fact to let Spiderman fight against 2 enemys. There was given the information that in the last Spiderman movie there were to much enemys for the Spiderman . so there decited to take maximum 2 enemys.