It's not going to happen, and even if it does in some small niche, it's not going to replace battery electric. Electricity is ubiquitous, H2 infrastructure is disappearing.
For now at least. Hydrogen would be a fantastic energy source for vehicles if we were at the point where renewable electricity was abundant and we could spare it to inefficiently make hydrogen locally, as the fuel cells are simple and don't require nearly as large of an amount of rare elements a battery does.
Because trying to convert all of the over 1.5 billion cars to electric with lithium batteries isn't really going to work either.