In my opinion, RE4 kind of rendered the other storylines from before a bit of a waste of time. You were introduced to all of these protagonists through 0 to RE3. In general, they made an oath to stop Umbrella after they survived their respective ordeals. So there probably should have been one final game about that company being confronted, and being eliminated. However, RE4 just begins with a brief explanation that they went bankrupt. It just didn't feel very satisfactory.
There is a rail shooter that was originally released on the Wii, and it's on the PS3 too. The Umbrella Chronicles. It has these retelling segments of a few of the prior games, but there is an original story as well about Chris and Jill stopping Umbrella in Russia. This takes place in the year 2003. But the game kind of sucks, as it's basically a shooting game with nothing remotely scary about it.
I just think they should have ended the primary arc more decisively. But it is what it is. And now, all they do is mention Umbrella, because they know if they keep doing this, the fans will long for a conclusion. But they do it so gradually, that you start to believe they're just doing it for the hell of things.