It's certainly going to be a fight, while the Navajo council supports the plan, a largish (vocal) part of the tribe doesn't.
The Hopi also don't. If you have followed the long history of the Hopi and Navajo "disagreeing" over their "ancestral" lands this will be just the latest phase.
While the Navajo creation story has them springing from this area, their language is so closely related to Northern Athabaska's tribes (northern Canada) they can converse. In fact only the Navajo and Apache (in the southern US) speak this language group.
2008 F350SD V10 with an 2012 Arctic Fox 29-5E
When someone tells you to buy the same rig they own, listen, they might be right. When they tell you to buy a different rig then they own, really pay attention, they probably know something you don't.