What on earth does he think they're going to base it on? FIAT Group has five possible SUV donors: Panda 4x4, 500X, Jeep Cherokee, Dodge Journey/FIAT Freemont, Jeep Grand Cherokee. Of those, the Panda is out, as it's too small for an Alfa model, and the same could be said of the Punto-based 500X.
If it's a big SUV, and the Maserati Levante is the donor, then it's still based on a Jeep (Levante is based on Grand Cherokee). If it's (as more likely) a compact SUV, then the Cherokee fits the bill.
Just because it's not likely to be a re-body and a re-badge of the Cherokee, it doesn't mean that the Alfa SUV won't draw heavily on Jeep's models: C-US-Wide allows for a lot of variation in vehicle size, while retaining significant parts reuse.