Didn't Savin say something about doing CoC2 as side project? Not sure though..
Anyways, I think CoC only ended because the code was such a mess and Fen running out of ideas (or fun)..
TiTs will be alive as long there are ideas to continue it and coding for it isn't a royal pain..
The basic story may be the hunt for the probes, but who says that getting the last one will end the game? Steele sr doesn't seem to think that lacking a head will really hurt SteeleTech, so there is little reason for Steele jr to stop adventuring just because he is rich now.. Especially if his adventures make SteeleTech more influental and/or richer..
On the other hand, CoC3 and TiTs2 when?`=P