Complex sentence: It is up to Po, The Furious Five, and their new friends to stop this weapon; but first, Po must confront his long-lost past, with the help of Tigress and the others.
Split into simpler sentences: It is up to Po, The Furious Five, and their new friends to stop this weapon. But first, Po must confront his long-lost past, with the help of Tigress and the Others.