And it did get an animation, isn't it? Even though it took ages.
However, Junk Warrior is arguably more notable than Flame Wingman - Yusei still use it often, even after he obtained Stardust Dragon, unlike how Judai almost completely ignored his old E-Heroes Fusions after he received his Neos deck.
Heck, the very final attack on the very final duel of 5Ds? It was Junk Warrior's. And Yusei won.
Meanwhile, Flame Wingman's appearance in the final duel of GX merely amounts to a fodder. It was Shining Flare Wingman who had more appearance in that duel, and even then, the final attack was from Neos, with the implication that Judai lost due to attacking a 5000 ATK Osiris with a 2500 ATK Neos.