I'm not sure why people are acting like they haven't seen him. He was just in Midsommer. He was actually also originally supposed to play Pennywise in the It reboot and something happened and they went with Skarsgard instead. I think he fits more than the upcoming Batman...
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Yeah I think a lot of what he did was often attributed to initial shock of transformation and the need to feed/cure himself. Hell even in TAS he was like a villain for half an episode and then eventually joined Blade and even helped fight Peter when he was the manspider but also knew to only contain him.