Lines aren't out yet, but Blanchfield will probably be a heavy favourite against Geltmacher. At times Blanchfield did struggle with the size of her opponent in her last fight, and Geltmacher is a four time All-American wrestler who constantly bumrushes forward in an attempt to get her opponent to the ground. Blanchfield is an elite BJJ girl and does have a solid high kick, but we haven't seen her deal with a pressure fighter on the feet yet and there's a slight possibility she wilts when confronted with a bowling ball who won't stop coming forward
I suspect Blanchfield's ML will be steeper than it should be, but I guess we'll have to wait until lines are released to really see