UPDATE (Oct. 13): Avatar has been forced to postpone the remainder of their U.S. tour after singer Johannes Eckerström tested positive for COVID-19. View tweets from Avatar and the singer in relation to this news torward the bottom of the page.The fall is coming. Are you ready for the hunt? Avatar fans will certainly be hunting for concert tickets as the band has just announced a fall U.S. headline tour.The band, who released their Hunter…