I wish I knew. The last time I wanted to buy a copy of the Expendables, they had the DVD/Bluray/Digital package - but no Bluray only.
Ironically - it was on sale for the same price as the DVD only release.
I really don't care about Digital copies - and if I really wanted the DVD, I'd buy the DVD!
I'm hoping it'll last just long enough for people to transition to Bluray.