With all credits to those due, i wanted to make a custom subclass that replicates the Hulk from Marvel. Here I'll show what I'd like to suggest.

DYNAMIC DURABILITY

In addition to immense strength, your body possesses a high degree of resistance to physical harm. Starting when you choose this path at 3rd level, when you enter a rage, your Constitution modifier for Unarmed Defense is doubled for the duration of the rage. While raging, you also can not be grappled or restrained by creatures your size of smaller who's strength score is lesser then yours. You become proficient in either Nature or survival, and automatically learn the language and ability to read runes and giant.

THUNDER CLAP

By slamming your hands together, you create a tremendously powerful force of thunderous energy. At 3rd level, as an action, you can clap your hands together, replicating the effects of the Thunderclap Spell a number of times equal to your proficiency bonus. The damage increase at 6th level (2d6), 10th level (3d6), and 14th level (4d6). The save DC is 8 your proficiency bonus your Strength modifier.

GIANT'S STATURE

Beginning at 6th level, You grow to an incredible size. If you are smaller than Large when you enter your rage, you become Large, along with anything you are wearing. If you lack the room to become Large, your size doesn't change. Your weapons also grow to match its new size. While these weapons are enlarged, the target's attacks with them deal 1d4 extra damage. At the beginning of your turn, if you are under an effect that has changed your physical form and enter or maintain a rage, that effect is suppressed until your rage ends.

SUPERIOR LEAPING

Upon reaching 10th level, your highly developed leg muscles can make leaps at great distances. When making a long jump, your jump distance is tripled and you no longer half your distance for leaping. While raging, the distance is instead quintuple. You can use your reaction when you fall to reduce any falling damage you take by an amount equal to five times your barbarian level. If you land next to any creature within 15 feet, they must succeed a Strength saving throw of fall prone. The DC is 8 your proficiency your strength modifier.

TITAN'S STATURE

Your rage has no bounds, growing to even greater size. Starting at 14th level, whenever you enter a rage and while raging, your size now becomes Huge, your reach increases by 10 feet, and your enlarged weapons deal an additional d4 (total 2d4) damage.