He isn't literally a mecha suit though, i do agree that the size difference is a bit too much, but this is a new artist on the character so i am guessing this is his vision, because when it comes to Hulk it really depends on the artist, some make him roughly the size of Thor and other heroes, others make him gigantic.
ALL HAIL THE HADARI YAO, THE OMEGA'S OMEGA, BEYOND OMEGA, THE VOICE OF SOL!!!! NOW AGAIN THE ONE TRUE AND ONLY GODDESS OF THE X-MEN AS CLAREMONT INTENDED!!!!!
ALL HAIL THE HADARI YAO, THE OMEGA'S OMEGA, BEYOND OMEGA, THE VOICE OF SOL!!!! NOW AGAIN THE ONE TRUE AND ONLY GODDESS OF THE X-MEN AS CLAREMONT INTENDED!!!!!