Mars intends to create a global powerhouse.Shares of global snack company Kellanova (K 7.71%) are soaring on Wednesday, just a little over a week after the last time they soared. This is usually a sleepier stock, but today, a rumor was confirmed: Mars plans to buy the company for $35.9 billion. And that's why Kellanova stock was up almost 8% at 10:30 a.m. ET.An irresistible offerIn October, Kellogg Company spun off its North American cereal business as WK Kellogg, and the remaining brands and geographies be ...