I think he'll be phased out. spoilers:end of spoilers
I expect younger Logan to sub in for the old man in Gold in short order, and it's probably the younger version in Phoenix Resurrection as well. But Astonishing's plot will be impossible to do a switcheroo on, and I expect Weapon X to be unaffected too. Once those two wrap up, his solo will get rid of him. That could be a year away. We're going to have four Wolverines for a while! That's OML, 616, Jimmy Hudson, and Laura Kinney.