Not really, Infinite Crisis sent Wally into the speed force (AGAIN)… then they even shoved Bart Allen into it too. Effectivly 'killing' both Flashes till Bart came back later and revealed the 'Speed force' itself was dead.
Zero Hour also had Wally end up in the Speed Force.
Regardless of the legitimacy of these 'deaths'... there is a grand (stupid) history of DC's Crisis' of having someone standing there holding an empty Flash uniform
Barry made it famous, but Wally is the one they usually 'kill' for these stupid things.... then in a year or less they bring him back. I expect the same treatment here.