Sounds like when I accidentally formatted emmc and not sdcard, man I was pissed cause you get a USB driver install trying but need a box at that point to do a factory flash. Ended up getting lucky in that at that point you couldn't just read the device and my work without forensics and 5 days later new phone.
I feel you, and hopefully you had bad flash maybe after a few darkside wipes or a kick in the face (for the phone) will hopefully get it back.
I did see thread about putting soft keys on screen as touch bar across bottom of the screen somewhere on XDA if that helps.
Device: Samsung Tmobile S2 [SGH-T989]
ROM: Yaldak's Vanilla ICS RC2
Radio: Blaze 4g ICS Radio
Tweak Script: Newest Supercharger V6 ICS with modified services.jar
Superchargers 3g turbo boost
Superchargers Kernelizer Tweaks Script
Supercharger Extreme Battery Calibrator (manual as auto seems to freeze on countdown
(working on getting all that in to specific T989 pack single install as next project)