Bro. Chette has pointed out that the notion that OT saints "looked forward" to the cross is strained at best. What about the disciples "looking back" at it?
Luke 24:3-11 And they entered in, and found not the body of the Lord Jesus. ... He is not here, but is risen: ... And they remembered his words, And returned from the sepulchre, and told all these things unto the eleven, and to all the rest. ... And their words seemed to them as idle tales, and they believed them not.
They were so ignorant of Christ's work, that even after he had completed it, they didn't believe it.
What do we call someone who regards the "tale" of Christ's resurrection as "idle?" Lost!
It seems strange to me to say that Saints pre-Christ were saved by the same Gospel as we.