Has it been officially confirmed that Minsc will be a ranger? Wasn't he created when the barbarian/berserker class didn't exist in D&D, and isn't he specifically mentioned to be a member of a Berserker lodge? I've been wondering if Larian was going to change his class to match that...
I don't think it's been confirmed, but though you're right he probably would have been created as a barbarian had the class existed at the time I don't think it could or should be changed now given that he's now so well established as a ranger in the lore. Quite apart from his trusty animal companion, Boo, in the "Heroes of Baldur's Gate" comics Minsc's now sprung-to-life statue is said to be of "The Beloved Ranger" implying that's how he's come to be known to posterity. But while I hope and believe Minsc will still primarily be a ranger, I'm sure Larian will find a way to give a beserker flavour to him, either through multiclassing, feats, or just homebrewing as I think BG1 did when it gave him the Beserk special ability.