The problem is the last mission (Marvel's Avengers)

Went to the final plot task until the end of which even in the kwinget can not return, Mstuunas are divided, then a small fight, the Hulk breaks through the wall, Cap says that to the tower just can not get, he will follow the Hulk and try not to break, after which the Hulk jumps into the void and all in the distance there is another platform, but to get to it is not possible, or part of the map is not loaded or that I have no idea , it's a shame to even restart the mission at first it is impossible, maybe someone will tell what about it.