No way it's a 100K truck. Maybe upper $80Ks, with options to just over $90K.
They are simply sticking a blower on a Coyote. A lightly modified version of an engine they already install in F150s by the tens of thousands. They just need to find some weak points and address them.
Why would it cost $25K more to build? Ford doesn't run out and buy a $12K intercooled supercharger kit from Kenne Bell for each truck. The entire blower setup with intercooler and pump might cost them $2K, total. They used to sell the Eaton blowers for Cobras and Lightnings around $1300 as a new replacement part through dealers- so you know they were getting them for less than half of that.
They'll need to drop in another $2000 to $3000 to beef up the drivetrain- axles, trans, Tcase, driveshafts, brakes, fuel pumps. Some of it is likely up for the task already.
The same $100K+ predictions were thrown out on this site about the 2020 GT500 (again, based on the price of a Stellaris vehicle) and it was nowhere near $100K at launch. I predicted mid $70K and that's exactly where it came in.