Yeah no. In Mortal Kombat Deception, Sindel was a major character, not brain washed and morally good. Kitana had been enslaved by Onaga to serve in his army of the dead. With the help of Jade, Sindel led the Edenian army against Onaga (and Tanya, who betrayed Sindel and Jade to help Onaga). Canonically, Sindel helps Shujinko in gaining the strength needed to defeat Onaga. And in Sindel's own ending, Sindel manages to defeat Onaga with Jade's help, saving Kitana.
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Compare this to now, where Sindel's MK11 has her murdering Jade and chaining up Kitana as a slave. If anyone was renown for being a backstabbing bitch and being an opportunist, it was Tanya.[/hide]