In episode 54 of Dragon Ball Super (original air date, August 7):
Trunks uses some kind of transformation. After transformed SSJ2, his hair grows, electricity sparks disappear, and his muscles grow. It looks similar to the USSJ (Super Saiyan 1 third grade) but now he has short hair, so could his hair grows like if he were transforming into a SSJ3? Is this a kind of new transformation or what?