My character was inserted into the script, but it was later removed.
The actor told Italian film site Bad Taste that Marvel decided to cut The Hulk from the upcoming Avengers reunion, Captain America: Civil War, that will feature almost all of the Avengers with the addition of Spiderman for the first time in the MCU.
I believed that [Hulk] would be in the film, but at the end, it was evident that they needed to reveal that the Hulk did something very significant, and that Marvel wanted to use this in a more upfront [manner]. […] My character was inserted into the script, but it was later removed. Who knows, maybe Hulk will never return.
However, [Marvel] want[s] to keep the revelation of what happened a secret, because it is something truly significant.