Today, the only VCIX that exists is for NSX.
There are no confirmed release dates for any other VCIX exams/certifications, nor have any upgrade paths from VCP/VCAP > VCIX been announced.
My suggestion - start your preparations for the VCAPs of today, and by the time you are close to being ready all the VCIX information may well be known.
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Although I am a VMware employee I contribute to VMware Communities voluntarily (ie. not in any official capacity)
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