Why is Barry Allen coming back?

Why can't a dead character stay dead! Wally West should remain the Flash. To be honest, I don't know what is happening. I don't know how they are doing it--all I know is that he's coming back---when I think he shouldn't be. Your thoughts?

Barry Allen is back because Dan Didio and Geoff Johns are in love with the Silver Age.

Bart Allen pretty much sums up my thoughts on bringing Barry back in Rebirth 1 but I'm reading it all the same, mainly because I like Barry (like him better in the late 80s than how Johns is writing him) and I like Flash villains.