Characters: Mr. Fantastic, Invisible Woman
After ending the mission Juggernauts and Crosses you should turn right and head to the Central Park, searching for the circus tent (look at the depicting arrow, your minimap suggestions and a phantom lego character to find the right way). When you reach to the objective, approach to the fountain as Invisible Woman and lift up an ice box to scatter some bricks. Build a Fantastic Four panel from them, then switch into Mr. Fantastic and use an item you've already created. Wait for vehicle to appear, then use it to begin next mission - Doctor in the House.