Thanks to jojo for pointing it out that the forthcoming German release of the Underworld Trilogy might well be a slipcased SteelBook collection. It’s due for an August 20th release, check it out and make your own mind of it:
Up for pre-order now on Amazon.de:
Underworld – Trilogy [Blu-ray] – 42.99€
EDIT: Confirmed a SteelBook by SONY! 
They also confirm that the logo is on the slipcover and won’t be on the SteelBook itself.