This doesn't make sense.
First of all, gaming is kind of a side-hustle for Nvidia at the moment. Gaming is like 20% of their revenue at the moment and it's only going to lower in the short and mid-term.
Secondly, right now Intel is throwing an unprecedented amount of cash trying to push their own GPU architecture for gaming. Why the hell would they choose to undermine their own solutions to pair up with an ultra-expensive GPU from Nvidia?
And how would that work? Nvidia would sell Intel the iGPU designs to include inside Intel's SoC built on TSMC (which never happened before and would become a massive headache for IP and trade secrets), or was Nvidia going to sell a chip for Intel to put into their multi-chip module (like Kaby Lake G with Vega M) which then spends a lot of power in inter-chip connection?
This sounds like one of those MLD make-believe stories like the time he declared Arch was dead, it wasn't going to release and Intel's whole GPU project was being shut down... only for Arc GPUs to actually release a month after that.