Saw this (in Japanese) via RocketNews24:
【知ってた】らあめん花月嵐のコラボメニュー「嵐ゴーゴーまぜそば」が無慈悲なほどゴーゴーカレーだった | ロケットニュース24 (rocketnews24.com)
It's thick, chewy ramen noodles.... but instead of soup, it's coated in Japanese Curry sauce, topped with an egg. The curry sauce might contain roast beef/pulled pork and vegetables as well.