>>716270283There is a new Splinter Cell game in development at Ubisoft Toronto.
But they can't figure out a way to shoehorn it into the open world meme they've built themselves so it's in development hell.
As for your last question, Chaos Theory is the product of a ton of different things coming together. Great design, music, voice acting, revolutionary tech, etc. The likelihood that modern day Ubisoft could do that again is almost 0.