MBC has decided on Solbi being the new MC of Music Core starting from middle of May in a new format change for summer. The reason for Sun Ye, So Hee and T.O.P to quit their Music Core hosting jobs is because of their need to prepare for Wonder Girls and Big Bang new albums respectively. They are still looking for a male host to replace T.O.P. While this means the end of the WonderBang collaboration, it also means that Wonder Girls is not tied down by the stupid SBS-MBC spat when they start promoting their new album. (source)
Guess the news came too late for Hollywood Bowl 2008.