I think it's important not to separate the traditional notion of wellness with what we refer to as new age wellness, as ultimately, they go hand in hand. In other words, this means creating a balance between what's new and trending, and the more traditional services you might associate with a spa. For example, even if you have a vision for an avant-garde wellness area, you're still going to want your more traditional aspects such as a gym and spots to rest.
New trends I've come across in hospitality include IV bars, and crystal rooms that are completely covered in crystals to generate positive energy. Another exciting movement is that of eccentric wellness, which has seen a rise in attention towards psychedelic drugs, shamanism and so on.
While these two approaches can be effectively combined, you need people to really understand how they integrate in order to implement them correctly and in a way which will genuinely benefit guests, staff and your overarching wellness 'brand'. First, you need to educate, before recruiting the relevant people to effectively put your vision into practice.