Here is a list not of included bands but limited to that UFA might just get away with opening for:
Saliva
Powerman 5000
Drowning Pool
Disturbed
Linkin Park
Slipknot
Limp Bizkit
Korn
Three Days Grace
Breaking Benjamins
System of A Down
Head PE
Nothing Face
Mushroom Head
Hanna Montana
or what I would like to see, a nostalgic 1990's NuMetal Revue
What I think happened is the last couple days of backlash for Testament caused negotiations to happen thus UFA ended up on the Helmet show.
But we can all be thankful that voicing our opinion got them off the Testament show, whew!
Let 'em have Helmet.