Alistair Overeem isn’t done with the kickboxing world just yet. In his first kickboxing match since 2010, Overeem overcame a slow start to win a thrilling unanimous decision (29-26, 29-26, 28-27) over rival Badr Hari in their trilogy bout Saturday in the main event of Glory Collision 4 at GelreDome in Arnhem, Netherlands. Alistair Overeem with the incredible comeback at #COLLISION4 pic.twitter.com/OrzjCQztPL — MMAFighting.com (@MMAFighting) October 8, 2022 Following the win, Overeem, 42, declared himself the new Glory heavyweight champion, prompting reigning titleholder Rico Verhoeven to enter the ring for a staredown with the former UFC and Strikeforce star. “Rico…