I do not know about anyone else here. I have been here for quite awhile but my main issue has been never having a team of co-developers.
As far as discounts on Steam, it seems to me that games are cheap there, not so much incentive to give further discounts.
I think a collaborative effort which can draw designer developers to one project that reflects other games would be a better idea. For instance, using characters that are from the other games to interact in one game so that there is a meeting of minds universe similar to Fractured Realms in Diablo 3.
Call it Fractured Realms Universe, for instance. Create weird interactive scenes where the characters both interact or never interact with all variety of goals and missions.