Am not familiar with the site you are referring at OP but, I can almost be certain it's fake out of speculation.
1. Firstly, should Chipmixer be looking to start a new site, to keep there customers while the pursue there case in court, they would as well announce it somehow on there site or where ever they do some publicity campaign.
2. Any attempt to create a new site would be undermining there case in court which is centered on scam and more scam charges would be filed at them to have which to continue business (scam) even with there reputation an legitimacy of the claims yet to be proven. (Note: am not saying Chipmixer is or was ever a scam, that's left for the court to decide).
Be mindful what you go with and in the event that your unsure, there are other mixers in the forum like, Sinbad.io, [banned mixer], [banned mixer] and the likes of those.
You could do your findings before picking any.
That's correct; we'd probably be the first ones to know about a possible Chipmixer re-launch on the forum; it was one of the most, if not the most, well-known service here due to its signature campaign and by being an established mixer for quite a few years. On top of that, Chipmixer was only running through an onion link, which could only be accessed using the Tor browser. Thus, any kind of Chipmixer website on the Clearnet is almost definitely a scam or phishing attempt. Thus, it'd be best to stay away from any kind of website that resembles the real CM and stick to a few alternative mixers that you can find around the forum.