No, he didn't - if this is part of that same storyline, then I'm presuming Zod's (and the planet's) demise happened within the next issue or so. If he's going to be turned into a charcoal briquette anyway, he should at least get a chance to go down fighting as the Krypto we all know and love. Look at his takedown of the Kryptonite Man in 'Whatever happened to the Man of Tomorrow?' - THAT was a good 'heroic sacrifice' moment.